Editor's note: This story has been updated to include additions to the roster.

Actor Ben Stiller will be in Dallas soon, but it's not to promote a movie. Stiller will be one of several celebrities visiting for a charity tennis match hosted by Dallas Mavericks basketball player Dirk Nowitzki.

The inaugural Dirk Nowitzki Pro Celebrity Tennis Classic will take place Sunday, Sept. 18 at Southern Methodist University from 10 a.m. to 2 p.m. Participants include pro players Andy Roddick, John Isner, Benjamin Becker, Mark Knowles, and Mitchell Krueger, actors Ben Stiller and Boris Kodjoe, and basketball stars J.J. Barea and Harrison Barnes. More celebrities will be announced this week, per a press release.

The tennis classic is just the latest charity initiative from Mavs' No. 41. Every spring, Nowitzki hosts the Heroes Celebrity Baseball Game, which features a round played by Special Olympics athletes. Like the baseball game, the tennis match benefits the Dirk Nowitzki Foundation, which awards grants to organizations that focus on children's well being, health and education.

An added bonus: This tournament allows Nowitzki to get back to his roots. According to Sports Illustrated, Nowitzki began his career on the tennis court, but quit at age 15 after "not being accepted in the sport because of his height." (He reportedly still plays often at the court at his home in Dallas.)

Tickets to the Pro Celebrity Tennis Classic cost $100 for adults and teenagers, and $41 for children ages 3-12. Kiddos ages 2 and under get in free. Buy your ticket at Ticketmaster.com.