Keira Knightley sat down with Ellen DeGeneres for an interview, and admitted that she is nervous about having a baby boy. Credit: Michael Rozman/Warner Bros.

Currently expecting her first child with husband James Righton, Keira Knightley is quickly learning that with pregnancy, some things just can't be planned — unless Ellen DeGeneres is involved. "There's a whole birthing plan [in place], but what is the plan, apart from to get it out?" The Imitation Game star, 29, joked in a Feb. 17 interview on The Ellen DeGeneres Show of what will happen when she goes into labor. "My plan is to get it out."

Sensing an opportunity, DeGeneres offered to be by her side during delivery. "Back in the day, people would be in the field and have a child," the comic said. “You can be on set — or I'll find a field!"

Knightley's response? "[I'll] drop it out, keep working. Pick [the baby] up, that's my plan," she joked. "That would be wonderful for television, but not so good for me."

Though she's keeping the gender of her baby a secret, Knightley has given thought to what may happen if she welcomes a baby boy later this year. "Somebody said to me the other day, [that] the problem with boys is — sorry this is horrible — but when you're changing their nappies, you can get the wee in your face," the British stunner told DeGeneres, who guessed Knightley is carrying a boy. "I never knew that before so it was terrifying. Apparently they roll as well, so you have to like try to stop them while you're trying to grab something else in order to stop them peeing in your face. That sounds quite interesting."

Mommy fears aside, Knightley says one perk of expecting is that she can pull the pregnancy card on her rocker husband — especially during awards season as she makes the rounds supporting The Imitation Game.

"I'm [telling him], 'you have to come with me, support me!'" she tells DeGeneres. As the actress explains, Righton (who fronts the British rock band the Klaxons) is doing his part to party on Knightley's behalf. "There's a lot of free champagne [at events], so he thinks because I'm not drinking, he has to. I'm eating for two and he's drinking for two," she joked.

Us Weekly confirmed Knightley's pregnancy in December, 19 months after she and the Klaxons singer married in an intimate town hall ceremony in the south of France.