Full HouseActress Jodie Sweetin, best known for her portrayal of middle sister Stephanie Tanner on 'Full House,' is engaged to boyfriend Morty Coyle.

Coyle, who fathered Sweetin's 5-month-old daughter Beatrix, popped the question in front of family and friends at Sweetin's 29th birthday celebration at Los Angeles' Kibitz Room.

PEOPLE reports that despite the diamond decorations Sweetin's friends had set up around the event space to hint at what was to come, Coyle's proposal with a two-and-a-half-carat oval sapphire and diamond ring came as a shock to the actress.

"It was a complete surprise," says Sweetin. "We are just thrilled and I am in shock still!"

Despite her happiness, Sweetin says that the couple's bond was cemented long before Coyle presented the ring. "We were absolutely committed before this, anyway. We're just so excited."