The hotel where Abba stayed after winning the Eurovision Song Contest has shared a rare picture of the pop group in its lobby.

The picture shows Anni-Frid Lyngstad, also known as Frida, adjusting the clothing of Benny Andersson, who was her boyfriend at the time.

The pop group had their victory party at The Grand in Brighton on April 6, 1974, after winning Eurovision in the city with their hit Waterloo.

The 204-room hotel is celebrating the Swedish pop group’s anniversary and shared this rare colourised image of Frida and Benny.

The Argus: The hotel shared this rare image of Frida and Benny in the foyerThe hotel shared this rare image of Frida and Benny in the foyer (Image: The Grand)

The couple first met in 1969 and lived together from 1971. They married in 1978 at the height of Abba's success but divorced in 1981. 

Speaking about the city at the time, Benny said: “The relaxation I felt strolling around Brighton, breathing all that beautiful, fresh, spring air was something fantastic. The town had a fascinating look and is like I always dreamed a British coastal town should look.

"I've promised myself that one day I'll spend some time there and get to know the place really well.”

The BBC had secured a rate for competitors capped at £15.95 a night for bed and breakfast at The Grand and The Bedford hotels.

Abba stayed in the Napoleon Suite after the success of their hit song Waterloo.

The Argus: From left, Anni-Frid Lyngstad, Benny Andersson, Agnetha Faltskog in red jumper and Bjorn Ulvaeus outside Brighton DomeFrom left, Anni-Frid Lyngstad, Benny Andersson, Agnetha Faltskog in red jumper and Bjorn Ulvaeus outside Brighton Dome (Image: Argus Photographic Archive)

The Grand is celebrating the anniversary of their Eurovision win with Abba-themed cake and cocktails for guests this month.

A spokeswoman for the hotel said: “Throughout April, guests can indulge in the hotel’s cake of the day – a traditional Swedish cake garnish with chocolate musical notes on top, and nods to ABBA to celebrate the iconic pop band.

“Fans can also enjoy a delicious range of Abba-themed cocktails including the Honey Honey; made from Jack Daniels Honey, Disaronno Amaretto, honey, lemon juice and passionfruit puree, the Gimme Gimme Gimme; a fun and fruity blend of silver tequila, watermelon, strawberry and lime, or the Mango Mia; a mocktail made from mango puree, Ceder’s 0.0 per cent gin, pineapple juice, lemon juice and sugar syrup.”

The Argus: The Abba-themed cake being sold at The GrandThe Abba-themed cake being sold at The Grand (Image: The Grand)

Mayor of Brighton Jackie O’Quinn unveiled a blue plaque outside Brighton Dome in Church Street last week ahead of the anniversary of the pop group’s victory.

The song scored 24 points and marked the first Eurovision win for a Scandinavian country.

Crowds gathered to watch the unveiling, including two super fans travelling from Belgium.