Martina Navratilova and Julia Lemigova Martina Navratilova and Julia Lemigova

Tennis champ Martina Navratilova is engaged after she proposed to longtime girlfriend Julia Lemigova (where else?) during the middle of U.S. Open!

On Saturday, Navratilova got down on one knee between the  men's semifinals while everyone at Arthur Ashe Stadium watched on the jumbotron outside. (It's a good thing she said yes!) "I was very nervous," Navratilova she told The Associated Press. "It was kind of an out-of-body experience. You've seen people propose at sporting events before, in movies, in real life. Here it was happening to me. It was like I was watching myself do it."

Out and proud celebrities

Navratilova, an 18-time Grand Slam champ, and Lemigova have been dating since 2006 and hope to marry in Florida where they live.

Watch the proposal: