Two original cast members of CBS show The Mentalist are rumored to be leaving.

Co-stars Amanda Righetti and Owain Yeoman are said to be leaving after they starred in The Mentalist after six seasons. Huffington Post reports that the couple is likely to leave after they unmask the serial killer Red John. He is supposed to be revealed by the end of the year.

Yeoman and Righetti play Special Agents Wayne Rigsby and Grace Van Pelt, who had an on-again-off-again relationship. By the end of last year's finale, the two were back together.

According to MSN, The Mentalist creator, Bruno Heller, would not comment whether or not the two actors are leaving at the end of the season. Yet starting in 2014 two new actors will be joining the cast furthering speculations of Righetti and Yeoman’s departure.

This news comes after Cote de Pablo confirms she will be leaving NCIS. Last week Rob Lowe and Rashida Jones stated they will be departing Parks and Recreation after next season.

The Mentalist will return to CBS on Sept. 29 at 10 p.m. ET.
Image courtesy by CBS