"I've done this with other professional teams and other friends of mine," said Crystal. "You go and give back, and it makes you feel good."
"It's cool because they know all about us," said Choice, a running back. "To help them out, that's really cool."
The event is an annual tradition for the Cowboys.
"It's more than football," said Choice.
The team always plays on Thanksgiving Day. The same day, the Dallas Cowboys help the Salvation Army kick off its annual holiday kettle drive.
Billy Crystal is in town to perform his Tony Award-winning Broadway show "700 Sundays," which opened Tuesday at the AT&T Performing Arts Center in the Dallas Arts District.
The show runs through Nov. 22.
Crystal said he was happy to be help the Cowboys serve up lunch.