Paris Hilton on Kim Kardashian Pregnancy -- 'I'm Really Happy For Her'

They ain't exactly friends anymore ... in fact, they're more like fierce rivals ... but Paris Hilton tells TMZ she's happy her ex-BFF Kim Kardashian is knocked up with Kanye's baby.

Paris -- who is NOT with child -- was on her way into Emerson Nightclub in Hollywood last night when we asked her how she felt about Kim's super famous fetus.

"I'm really happy for her," Hilton said.

Paris then proceeded to enter the club scene ... where people in Kim's, er, "situation" aren't usually welcome with open arms ... right Craig Robinson from "Knocked Up"?