Minka Kelly and Derek Jeter in 2010
Juan Soliz/Pacific Coast News
08/02/2011 at 11:00 AM EDT
Before dating Yankee slugger Derek Jeter, Minka Kelly struck out when it came to her knowledge of baseball.
"When I met Derek, I didn't know anything about baseball at all," Kelly says in a new HBO documentary, Derek Jeter 3K
, which premiered last week.
"I didn't know the difference between a run and a homerun," the actress, who's been dating Jeter since 2008, continues. "I thought if you made a connection with the ball, that was an automatic hit."
In the film, about Jeter's quest for 3,000 career hits
, the private couple
joke about bonding over baseball.
"She's lying," Jeter, 37, kids. "She had a poster of me on her wall when she was in high school."
Later, though, the New York Yankees star confirms that Kelly, "really didn't know a thing about baseball. … I'd come home and she'd be happy and say, 'You got four hits!' "
Nowadays, Kelly, 31, is often seen
at Yankee games, cheering from the friends and family luxury box, and Jeter says it was his father who brought her up to speed on the rules of the game.
Says the baseball star: "Now, she knows what's going on."