Meet Dr. Jill Gideon, a new character in the “Criminal Minds” universe.

Felicity Huffmanis joining the BAU.

Jill is tapped to help Rossi (Joe Mantegna), JJ (A.J.

Felicity Huffman attends Raising Our Voices: Supporting More Women in Hollywood & Politics at Four Seasons Hotel Los Angeles in Beverly Hills in Los Angeles, California.

Felicity Huffman.Presley Ann/Getty

Huffman most recently made her U.K. stage debut in the Park Theatre production ofHiropposite Taylor Mac.