Actress Olivia Wilde has laughed off tabloid reports suggesting she is pregnant with her second child.

The TRON: Legacy beauty and her fiance, Jason Sudeikis, are already parents to son Otis, who turns two in April (16), and the couple hit the headlines on Wednesday (27Jan16) after sources told Star magazine Olivia is preparing to welcome a new member to the family.

"They started talking about having another baby as soon as their son, Otis, was born, and it looks like it's finally happening," the insider said. "Olivia knows life would be a lot crazier with two kids, but she and Jason can't wait to become parents again."

Star editors pointed to the fact Olivia appeared to be covering her stomach while attending the New York City premiere of her new show Vinyl earlier this month (Jan16), while she also reportedly shunned alcohol at the party, indicating she may be pregnant. They further fueled the speculation by publishing "Bump or burger?" across a photo of the stars at the event.

However, 31-year-old Olivia has since responded to the rumors herself, joking that Star writers may have mistaken herself and Sudeikis for Emily Blunt and John Krasinski, who announced they're expecting baby number two on Tuesday (26Jan16).

"Sorry, Star mag, but you got us confused with the cooler version of us," Olivia wrote on Twitter. "Congrats to John and Emily! My bump is all (burger)."

Olivia and Jason became engaged in 2013 after just over a year of dating, but they have yet to set a wedding date.

The marriage will be the actress' second after divorcing her first husband, Italian royal and rocker Tao Ruspoli, in 2011.