The 33-year-old 'She's All That' star is expecting husband Daniel Gillies' child and says she has been struggling to hide her baby bump on the set of TV drama 'Perception', reported Us magazine.
"I've been hiding my rapidly growing bump while shooting but this kiddo is vying for screen time. We clearly have a future actor on our hands," Cook said.
The couple, who wed in 2004, also has another big pending arrival.
They co-star in new TV movie 'Broken Kingdom', which Gillies has also directed.