Emily Deschanel is expecting her second baby with hubby David Hornsby, and she flaunted that burgeoning baby bump at the celebration for the 200th episode of her hit TV show Bones. The event took place on December 8th in Beverly Hills, and her sequined dress–a muted gray Lanvin, topped with a Max Mara black tuxedo jacket–was perfect for the occasion. She posed for many photos alongside her Bones costar David Boreanz.

Of course the question of the evening was whether or not Emily Deschanel’s character, Dr. Temperance Brennan, will also be pregnant on the show.

“Yes, I think it will be [written into the show],” Deschanel said to Us Weekly. “I’m not like a tiny pregnant person. I’m not going to be able to hide it behind something small; it’ll be easier to not hide it.”

Our favorite duo, @David_Boreanaz & @emilydeschanel, strikes a pose on the #Bones200 carpet! #bones pic.twitter.com/9449cx7zVW

— BONES (@BONESonFOX) December 9, 2014

It seems the sex of Emily Deschanel’s baby is as much of a mystery as the story lines on Bones.

“I know that it’ll happen in the next couple of episodes we’re filming, but that’s it,” she told Us of writing the pregnancy into the script. “I don’t know if it’ll be a boy or a girl.”

The 200th episode of Bones is set to air on December 11th, and it pays homage to Alfred Hitchcock. Executive producer Stephen Nathan hints that some fan favorites will be returning during the very special episode.

“We’re going to have as many people who have crossed our paths as we possibly can. There are limitations to that, of course,” he said.

Emily Deschanel and the rest of the Bones cast have already received congratulations on the 200th episode from several people from the celebrity world including Darren Criss, Benjamin McKenzie, and Zooey Deschanel–who is, of course, Emily’s younger sister.

Will you be tuning in on Thursday night to check out the 200th episode of Bones? Are you excited to learn how Emily Deschanel’s second pregnancy will become part of the upcoming story line?