Watch: Fox Upstaged By F-Bomb

Megan Fox‘s live comedy debut this weekend was overshadowed when a castmate on Saturday Night Live accidentally swore on air. (Scroll down for the R-RATED video clip.)

The stunning star was guest host as the show returned with a bang.

Fox appeared in a series of sketches, as a mail-order bride, an air hostess and a sex-line worker and also introduced two performances from rock icons U2.

During her opening monologue, she joked, “Some of you will know me from Transformers, some of you will know me from TV, but most of you will know me from nude pictures on the Internet. There are a lot of them out there. Although I don’t ever remember posing for them,” before showing the audience a series of doctored photos of her nude.

But new Saturday Night Live castmember Jenny Slate stole the show from Fox, during a skit they performed together, when she slipped and said “f**king” instead of “fricking” live on air.

(c) 2009 WORLD ENTERTAINMENT NEWS NETWORK LTD. All global rights reserved. No unauthorized copying or re-distributing permitted.

MORE NEWS: Polanski Arrested