Ray Donovan signed on a new cast member to play a Russian gangster in Season 4.

Katie Holmes Reveals If She Will Be Returning For Season 4

The Wrap reported that Pasha Lychnikoff will be playing the part of Ivan Belikov in the series. Belikov will be on the radar of the L.A.P.D. Lychnikoff is known from his recurring roles on The Big Bang Theory and Deadwood.

Recently has been plenty news of additions to the cast of the series.

Avi To Get 'A Personal Life' In Season 4?  

A Deadline report revealed that Dominique Columbus will also be joining the cast of Ray Donovan for Season 4.

According to the report, the actor who is known for his work in Nine Rides and In Extremis, will play the part of "Damon, described as a street-smart, homeless teen who packs a mean punch and becomes involved with the Donovan family."

This development came at the heels of another casting announcement for the show, TVLine revealed that Lisa Bonet -- best known for her work on The Cosby Show -- will play the part of Marisol, "an unstable woman with a damaging secret."

Previously, Deadline reported that Ted Levine and Ismael Cruz Cordova are set to come on board season 4 of Ray Donovan.

The report reveals that Levine will play "Little Bill Primm, the proud owner of a casino in Primm, NV" and Cordova will portray "Hector, a middleweight boxing champion who forms a bond with Ray."

Prior to that, Variety also reported that Revenge alum Gabriel Mann is joining the cast of season 4 of Ray Donovan.

According to the report Mann will appear in three episodes of the season. He is set to play Jacob Waller, "an aggressive attorney who represents high-profile clients."

Season 4 of Ray Donovan will feature 12 one hour episodes and is expected to begin production in 2016.

Watch the preview for the finale of season 3: