January Jones, the Mad Men star who wowed audiences as Don Draper’s wife for a while, has announced what her Halloween costume will be.

January Jones’ son, Xander, got to pick out his mom’s Halloween look, pairing it with his own costume choice.

“I’m Claire from Jurassic World, per my son’s request,” January Jones said.

So what is Xander sporting this Halloween?

“He is a T-Rex and the dog is a Raptor. I don’t know. He wants to be Owen and a T-Rex,” January Jones said, referring to Chris Pratt’s character from Jurassic World.

But, back to January Jones’ costume. She is going as Claire, who was played by Bryce Dallas Howard. Howard herself made headlines recently when she talked about her stunt work for the film, which included running in stiletto heels. But it was another Bryce Dallas Howard headline this week that hits closer to home for January Jones.

Jessica Chastain and Bryce Dallas Howard have often been mistaken for each other. Just this week, Jessica Chastain told Jimmy Fallon that someone recently congratulated her on Jurassic world. But she is not in Jurassic World. That was Bryce Dallas Howard.

This is not the first time the issue has hit headlines. Bryce Dallas Howard and Jessica Chastain were in The Help together and had a chance to suss through this problem.

“First of all, any day where I get confused for Jess is a very good day. She’s one of the most beautiful human beings I’ve ever seen. We went to college at the same time in New York. She went to Juilliard and I went to NYU. It’s been going on for a long time. I remember thinking that I need to meet her. When we did The Help, we met each other and the first thing we did was find a mirror. We stood in front of it. And we compared. We’ve got red hair. There’s enough similarity that people make that comparison. My goal is to play sisters with her.”

Chastain herself tweeted about the phenomenon.

True story. #BryceDallasHoward is in #JurassicWorld pic.twitter.com/YUPBzRn4eg

— Jessica Chastain (@jes_chastain) May 31, 2015

So if January Jones is smart, she can hit houses twice on Halloween, once as Bryce Dallas Howard, once as Jessica Chastain.