The first still featuring Jennifer Love Hewitt in season 10 of Criminal Minds was revealed on August 4.

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TVGuide published the image which showed Hewitt in character as Kate Callahan with Thomas Gibson, who plays Aaron Hotchner on the show.

Hewitt is seen wearing a professional, plain black top. Kate joins the BAU as an undercover agent.

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Erica Messer, the executive producer of the CBS series, spoke about how excited they were about having Hewitt come on board in a statement.

"We're thrilled to introduce a new special agent by adding the very talented Jennifer Love Hewitt to our amazing cast," Messer said. "Many of us on the show have enjoyed working with her over the years and look forward to again."

It seems like Hewitt's star power will more than compensate for the void left by the exit of Jeanne Tripplehorn's character, Dr. Alex, who was a fixture on the show.

On July 8, Joe Mantegna, who plays David Rossi on Criminal Minds, tweeted about how Hewitt's character was a "perfect addition" to the show.

"At the read through yesterday for our first ep, @TheReal_Jlh fit right in and her character is the perfect addition. @CM_SetReport," he tweeted on July 8. 

Hewitt has worked with CBS before, as she starred in Ghost Whisperer. More recently Hewitt featured in two seasons of The Client.

The second and final part of the finale, Demons, aired on Wednesday, May 14 on CBS at 9 p.m. ET/PT.

Season 10 will premiere on CBS on October 1.

Watch the preview for Demons: