The Saturdays singer has been dating the Brighton & Hove Albion player for more two years.
The singer took to her Twitter page to share the happy news, reported Daily Star.
In a post on her official page she wrote, "Guess what?" alongside an image of herself showing off a large diamond ring on her left hand while Bridge kisses her on the cheek.
Only last month, the singer denied rumours that an engagement was on the cards for the couple.