Exclusive proof Kevin Hart and Josh Gad get really dirty in 'The Wedding Ringer'

You might have heard rumors that Kevin Hart and Josh Gad get all kinds of disgusting dirty in The Wedding Ringer.

Here's proof that these rumors are true. There are a lot of bawdy scenes in the R-rated comedy opening January 16 and there's a particularly muddy football football game.

Gad's lonely character has to use Hart's Best Man, Inc. service to hire an entire wedding party of guys. This comes with the unexpected chore of playing Gad's screen father-in-law (Ken Howard) in touch football, as these exclusive pics reveal.

Bad news that new Dad's football pals include real-life greats Joe Namath, Ed "Too Tall" Jones and John Riggins. Yup, it's painful and ugly.

"This is one football game for the ages," Gad tells us.

Hart was impressed:
"We got to play with the legends -- 'Broadway' Joe Namath, Ed Riggins, 'Too Tall' Jones. These players were the scariest guys in their day. And they can definitely lay you out."
Check out this trailer if you need more on The Wedding Ringer.