They divorced in 1981 and nine years later Miss Faltskog married for the second time to divorced surgeon, Tomas Sonnenfeld. The marriage ended in 1993.
Speaking of her solitary life, she told Abba's biographers: 'I didn't sing a note for 13 years. I didn't even have a stereo in the house.'
Last night, Miss Faltskog's agent tried to play down the romance saying: 'Agnetha and Bertil were only having a night out dancing. They are not a couple.'