[With Mark Wahlberg’s “The Gambler” arriving in theaters tomorrow, co-star Anthony Kelley talks to SOHH readers about being on-set with the movie star.]

In-between takes, he would just drink water and get on the jump rope. I was like, “Why are you on the jump rope? Are you trying to get bigger?” And he was like, “No, I’m actually trying to lose weight.” I was like, “Wow, really?”

He told me he’s almost kind of like a mean guy because he’s kind of grumpy because he doesn’t eat as much. He can’t eat the foods he normally eats.

He was actually a really cool guy on the set and off of the set.

My uncle owns a non-profit and I would see Mark Wahlberg, Jessica Lange, John Goodman and others give back and my uncle heard about the opportunity to do an open casting call and it was with real basketball players.

At first I was against it. I didn’t want to do it and then I thought about it and using this tool, being a celebrity to give back, I decided to go up for the role.

I met up with the casting director and worked for about two months and went over the routine. I was able to memorize the lines and learned how to be comfortable. One strategy was to remember my lines while playing basketball. The other strategy was to sit on my hands while going over the lines in front of me.

The whole process was great. I fell in love with it.

Check out Anthony Kelley’s top five reasons you should see “The Gambler” in theaters.