The thriller series "How To Get Away With Murder" has welcomed a new addition to the cast line up, Wilson Bethel, after the actor finished his roles in "Hart of Dixie" and "The Astronaut Wives Club."

According to TV Line, the actor will portray the role of Charles Mahoney, the rich son of Arkin Wallace and Hart Sylvia from Ivy League. The three characters are seen to be a major addition to the line-up as show creator Peter Nowalk indicates that they will probably stick around for a while.

"The Mahoney family plays a really big part in a legal case in our last six episodes," showrunner Nowalk said to TVLine. "They're very wealthy people. It's a murder case, and it involves Annalise in a big way."

It's highly likely that the family of three will be involved in a criminal case to be handled by the show's main character Annalise Keating, who is played by Viola Davis, a criminal defense attorney and law professor at Middleton University. However, it is still not clear whether the wealthy family will be her clients or clients of the opposing party.

The other two cast additions are Adam Arkin, who will play the Warren Buffet-type patriarch Arkin Wallace, and Roxanne Hart, who will play the tough socialite Hart Sylvia. The new characters will come out as soon as the show comes back this Feb. 11, and there's a possibility that they will be sticking around until Season 3.

"How to Get Away With Murder" is an American drama series about a criminal defence lawyer and her intense cases. The series by ABC Studios was created by Peter Nowalk and produced by Shonda Rhimes.

The show follows Keating and five selected student interns at her firm: Wes Gibbins, Connor Walsh, Michaela Pratt, Asher Millstone, and Laurel Castillo. The second season of the series was ordered on May 7, 2015 and began airing on Sept. 24, 2015.