She recently confirmed her new romance with boyfriend Andrew Parsons.
Other stars who walked the red carpet included Strictly Come Dancing star and Paralympian Lauren Steadman, 25, Paloma Faith, 37, and Dame Jessica Ennis-Hill, 32.
Rebecca was radiant in a red blazer and a matching shirt with a plunging neckline. She added to the look with a pair of red, flared pants and strappy heels.
The Olympic swimmer accessorised with dangling golden earrings with a moon and star design and a matching clutch bag for the event.
Rebecca recently confirmed her romance with property manager Andrew Parsons, 28, marking her first relationship since her divorce from her ex, Harry Needs, 26, in 2016.
Talented ladies: Rebecca was radiant in a red blazer and a matching shirt with a plunging neckline, while Dame Jessica Ennis-Hill was also in attendance (L-R)
Still pals: Fresh off competing on Strictly Come Dancing with professional dance partner AJ Pritchard, Lauren showed off her sense of style on the red carpet
The sportswoman spoke to OK! Magazine while at OBLU Select at Sangeli in the Maldives, discussing her new man and remaining on good terms with Harry.
The two-time gold medalist revealed that she and Andrew will be heading off for a bit of winter sun with her daughter Summer, three, in the new year.
She said: ‘I said to Andy: “Hopefully a nine-hour flight with a three year old won’t put you off!” But he’s used to her now and they really get on – it’s cute.’
Stylish: Jessica and Lauren both opted for all-black ensembles for the red carpet debut, with the Strictly star opting for a silk skirt and a sheer lace crop top
Gone with the wind! The star’s curly up-do blew in the chilly Birmingham wind as she entered the glamorous venue
Fresh off competing on Strictly Come Dancing with professional dance partner AJ Pritchard, Lauren showed off her sense of style on the red carpet.
The Paralympic athlete donned a sheer, black lace top with a floral embellishment and paired it with a high-waisted, flowing black skirt.
Completing the look, the TV star styled her brunette locks in a ponytail and turned heads with a dramatic smokey eye.
Other sporting heroes who turned out for the bash included retired track and field athlete Jessica Ennis-Hill.
Work it: Yazmin Oukhellou and James Lock made sure they remained in the spotlight as they attended the BBC ‘s Sports Personality of the Year in Birmingham on Sunday
The three-time world champion looked sensational in an off the shoulder midi black dress.
She paired the outfit with a pair of green heels and a white and brown clutch bag, letting her brunette locks hang loose along her shoulders.
Heavyweight boxer Tyson Fury, 30, was accompanied by his wife and mum-to-be, Paris, 27.
The Manchester native wore a black pin-stripe suit with a black and red shirt. His other half donned a shimmering gold dress with a v-neck line and a wrap detail, with her growing baby bump visible.
Smitten: Love Island couple Kaz Crossley and Josh Denzel looked more loved-up than ever as they attended the BBC’s Sports Personality of the Year in Birmingham on Sunday
Shine bright like Kaz in an Abyss by Abby gown
Abyss by Abby metallic gown at Naked Dresses
Sold out – shop more from the label!
We can’t think of anything more appropriate for a red carpet event than this showstopping metallic number, as spotted on Kaz Crossley!
Stepping out at the Sports Personality of the Year Awards, the Love Island star blew us all away with her sparkling ensemble.
Styled by Sadia Gillen for the occasion, Kaz channeled some serious old school Hollyowwod glamour – she looks a million dollars!
That metallic gown? It’s an Abyss by Abby creation and features an on-trend cowl neck and delicate cami straps. With a subtle nod to our fave 90s trend, Kaz led the way in terms of style at the event.
Unfortunately, the dress is now sold out online (we’re not surprised, just look at it) but click right to try more from the label.
Stuck on Kaz’s silver style? We have you sorted with our roundup of lookalikes. Find our favourite metallic gowns in the edit below. We can’t get over that draped PLT number, or try Boohoo for the ultimate bargain buy.
Sadia then completed Kaz’s look with a faux fur shawl from Isobell London and dazzling jewels from Lara Heems.
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Couple: Heavyweight boxer Tyson Fury, 30, was accompanied by his wife and mum-to-be, Paris, 27
She accessorised with a pair of pink heels and a matching clutch bag.
Singer Paloma Faith easily stood out at the star-studded bash.
The Lullaby hitmaker, 37, wore an eye-catching black jumpsuit with a detailed, multi-coloured floral pattern and flared sleeves.
Topping off the ensemble with long earrings, she styled her blonde locks into large, dramatic curls.
Loved-up: Beth Tweddle and her husband Andy Allen also attended the star-studded event
Mum-to-be!: The Olympic medallist, 33, showed the first signs of her growing baby bump after recently announcing her pregnancy
Strictly stylish!: Amy Dowden was also present at the event with her fiancé Ben Jones after Saturday’s exiting Strictly Come Dancing final
Stunning: The professional dancer, 27, looked sensational in a cobalt blue figure-hugging bardot dress
Love Island stars Josh Denzel, 27, and Kaz Crossley, 23, were in a goofy mood as they arrived at the bash.
The couple posed playfully on the red carpet, with Josh leaning back to show off his other half’s sense of style.
While Josh wore a tux, Kaz looked radiant in a shimmering silver dress with a plunging neckline and a faux-fur wrap.
Dapper: Manager of the England national team Gareth Southgate also walked the red carpet, donning a classic blue suit for the evening
Pose: Olympic cyclist turned jockey and Strictly Come Dancing star Victoria Pendleton, 38, looked stylish in all black
Loved-up: Cricketer Jimmy Anderson and wife Daniella Lloyd, who married in 2006 after two years of dating, also arrived for the bash
Jockey and Strictly Come Dancing star Victoria Pendleton, 38, looked stylish in all black.
The former track cyclist wore a black mini-dress with long sleeves and a bejeweled embellishment, completing the look with thigh-high black leather boots and a black clutch bag.
Manager of the England national team Gareth Southgate also walked the red carpet, donning a classic blue suit for the evening.
The 48-year-old is odds-on at 1-4 with bookmaker Coral to receive an OBE in the Queen’s New Year’s honours list following the national team’s run to the semi-final of the World Cup in Russia back in the summer.
Couple: Other stars at the event included footballer Harry Kane, 25, and his fiance Kate Goodland, 25
Lady in red: BBC News presenter Sally Nugent, 47, donned a red midi-dress and matching heels for the event, while Paula Radcliffe looked stunning in a black and sliver dress (L-R)
Coral’s John Hill said: ‘Gareth Southgate has helped the nation fall back in love with the country’s football team again and after England’s surprising run to the semi-final of the World Cup last summer, the betting suggests he will be handed an OBE in the Queen’s New Year’s honours list.’
Cricketer Jimmy Anderson and wife Daniella Lloyd, who married in 2006 after two years of dating, also arrived for the bash.
Other stars at the event included footballer Harry Kane, 25, and his fiance Kate Goodland, 25.
The couple, who recently welcomed their second child, were in high spirits on the red carpet.
Harry wore a grey pin-striped suit while Kate turned heads in a black dress with a v-neckline and a slit on the leg.
Returning winner: Sir Mo Farah, 35, who won the Sports Personality of the Year award in 2017, attended this year’s ceremony with his wife Tania Nell
Family: The couple were pictured with their four children – Rhianna, Aisha, Hussein and Amani
Chic: Michelle Ackerley and Amy Williams were also in attendance at the event (L-R)
Sprinter Dina Asher-Smith, 23, turned heads at the ceremony, wearing a statement orange dress.
BBC News presenter Sally Nugent, 47, donned a red midi-dress and matching heels for the event.
Sir Mo Farah, 35, who won the Sports Personality of the Year award in 2017, attended this year’s ceremony with his wife Tania Nell.
The athlete wore a classic black suit while his other half looked stylish in a golden, sheer top with a bejeweled embellishment and a flowing white skirt.
Also in attendance were TOWIE stars James Lock, 31, and Yazmin Oukhellou, 25.
Respect! The singer gave a moving performance of Aretha Franklin’s Respect in tribute to the late singer
Star-studded: Gary Lineker was presenting the special evening with a guest appearance from Lewis Hamilton (L-R)
The couple, who recently quit the show mid-series to work on their relationship, looked stylish with James in a tuxedo and Yazmin wearing a sheer, lace dress with a slit on the leg that showed off her bronzed hue.
The BBC Sports Personality of the Year is the main award of the ceremony, which takes place each December.
The winner is the sportsperson, judged by a public vote, to have achieved the most that year.
The recipient must either be British or reside and play a significant amount of their sport in the United Kingdom.
The winner is selected by a public-vote from a pre-determined shortlist.
This year’s runner and riders
Harry Kane 6/4
Kane celebrates after scoring against Croatia in the World Cup in Russia this summer
Kane played at the 2018 World CUp in Russia, captaining England to their third semi-final in history.
The 25-year-old won the Golden Boot, finishing as the top goalscorer in the competition.
He became only the second English player to do so, after Gary Lineker in 1986.
Geraint Thomas 11/4
Geraint Thomas became the first Welshman to triumph in the Tour de France this year
Geraint Thomas became the first Welshman to triumph in the Tour de France this year.
Thomas, 32, was the third British rider to win the race and the sixth in seven years.
He’d been cycling in the shadow of Team Sky teammate Chris Froome up until his victory.
It marks a remarkable comeback for the Welshman after he crashed out at the ninth stage after suffering a broken collarbone last year.
Dina Asher-Smith 14/1
Dina Asher-Smith, 23, could become the first woman to win since 2006
Dina Asher-Smith, 23, is in the running to become the first female to win the gong since Zara Phillips in 2006.
The bookmakers have her as one of the favourites after she became the first British track and field star to claim a treble of gold medals at a major championships.
Millions watched her performances on the BBC, transforming her into a star and role model.
Lizzy Yarnold 28/1
Winter Olympic double gold medallist Lizzy Yarnold receives her OBE in October
With consecutive Olympic gold medals in 2014 and 2018, Lizzy Yarnold is the most successful British Winter Olympian and the most successful Olympic skeleton athlete of all time from any nation.
The 30-year-old was selected to be one of the two women skeleton drivers representing Britain at the 2018 Olympics in Pyeongchang, South Korea.
She went on to become the first person to defend an Olympic gold in skeleton and the first British athlete to defend a Winter Olympic title.