London, Aug 15 : Twilight star Kristen Stewart was shocked by a wave of tabloid rumours that claimed the star was pregnant.

The stunner admitted to being baffled after many US tabloids claimed she was pregnant with her co-star Robert Pattinson''s baby - because the two aren''t even dating.

Laughing off the rumours Stewart said they sparked off after she appeared on the sets with a button undone on her jeans.

The Daily Express quoted Stewart as telling Entertainment Weekly magazine, "It''s so absurd. I walk out of my trailer with my pants undone - and they think I''m pregnant? I mean, really? They think I''m pregnant? Come on! Like, dude, I don''t get it." (ANI)