Drew & Kirsten Get Catty!

Of all the young actors out there, the last one you'd probably pick to start a feud between two of Hollywood's nicest actresses would be Justin "I'm a Mac" Long. But witnesses tell OK! that's exactly what happened on Saturday when Drew Barrymore, who recently split from the Zac Braff clone, and Kirsten Dunst, who has been seen out and about with Justin, ended up at the same place at the same time.

First, the two starlets were both backstage for the Saturday Night Live broadcast. Drew was on hand to hang with good pal Cameron Diaz, who was making a cameo on the show, while Kirsten was there to cheer on her Spider-Man co-star James Franco, who had been given hosting duties for the week.

"Drew and Kirsten had a really awkward run-in," one witness tells OK!. "James had to deflect the situation by making a joke and walking away with Kirsten while Drew then fumed about it to Cameron."

And then later in the evening, the tension was thick in the air at new NYC hotspot Wildwood Barbeque, where the cast, musical guests Kings of Leon, and an entourage of other Manhattan celebs like Gossip Girl stars Ed Westwick, Penn Badgley, Blake Lively and Chace Crawford, went to celebrate after the show.

"Both Drew and Kirsten were there," says one partygoer. "But Kirsten didn't want to be near her, so they stayed far away from each other the entire night." Keeping their distance was a complicated matter, as both actresses kept having to step outside for cigarette breaks.