Rachel BilsonIt's rare you find a celeb owning up to a feud with a fellow co-star who used to be their bezza.

But Rachel Bilson hasn't been shy.

She's bumped her gums about falling out with her former OC pal, Mischa Barton.

She told the Metro: "We haven't been in contact for a long time.

"We fell out.

"We didn't work together anymore so we didn't see one another.

"I think she moved to New York or something.

"I'm not sure."

What's that we feel? A breeze of "couldn't care less" blowing past us?

At least Rach still gets excited by some celebs though.

She said: "I saw Lisa Kudrow the other day at Starbucks. I was so starstruck because I love Friends so much.

"I didn't know what to do with myself. I was too in awe to say hello."

Loves Friends? Ironic.