Yup, that's Chris Evans' brother, Scott (who couldn't look more like a superhero, as it happens), and the lady on the right there is Jimmy Fallon's sister. To quote Fallon "Mawm and Dad are going to freak out."

It's like your usual game of flip cup, only with more people flipping cups and with less Miranda Kerr bending over and beating Jimmy senseless. Well, she is Australian.  
 
One gets the impression that Jimmy has roared "I'M SORRY, GLORIA" many times in his youth.