Natalie Portman has always loved the theater, so its no surprise that the Oscar-winning actress attended theater camp growing up. Her favorite home movie, in fact, showed a theater-camp performance of Cabaret, where Portman and her fellow campers sang and danced on top of chairs in front of a small audience. Its a fun throwback to watch, but the reason Portman loved the video has little to do with her own performance.

As Portman explained on The Oprah Winfrey Show in 1999, this home movie contained a little surprise that she couldnt stop giggling about. About 50 seconds into the above clip from the show, its clear why.

On Portmans left was her friend Lauren, who tumbled to the stage when her chair slipped out from under her during a song-and-dance number. The audience gasped, but Portman found the video hilarious and shareable. She even took it to the set of Star Wars: The Phantom Menace back then to show to her fellow cast members.

Does [Lauren] know youre taking this tape around, showing it? Oprah asked Portman.

I think she shows it too! Portman said.

Portman went on to say that she hadnt seen her friend since their days at theater camp, to which Oprah offered up a surprise of her own.

Natalie doesnt know this, but her friend Lauren is here today. Come on out, Lauren.

Watch the friends reunite in the clip above.

Watch full episodes of The Oprah Winfrey Show on WatchOWN.tv.