Alex Wolff and Themo Melikidze have been cast as Dzhokhar and Tamerlan Tsarnaev in Mark Wahlberg’s Boston Marathon bombing movie “Patriots Day,” according to TheWrap.com.

Wolff, whose mother is “Thirtysomething” actress Polly Draper, has appeared on HBO’s “In Treatment” and on Nickelodeon’s “The Naked Brothers Band.” He’s also in a real-life band with his brother, actor-musician Nat Wolff. Melikidze’s latest credit is a short called “21st Century Shuffle.”

The cast for “Patriots Day” has grown over the past few weeks, as production continues around town. Roxbury native Michael Beach has signed on to play former Massachusetts governor Deval Patrick . Kevin Bacon has been cast as the FBI’s Richard DesLauriers.