| Film | Stumblin' |
| Paul Rudd | ... | friend |
| Paul McCartney | ||
| Mario Batali | ||
| Fred Armisen | ... | guy |
| Andy Samberg | ... | guy |
| Kristen Wiig | ... | singer Voice |
| Vanessa Bayer | ... | girl |
| Mike O'Brien | ... | guy |
| Greg Scarnici | ... | bear |
| Matt Yonks | ... | ping-pong player |
| Paul Thornton | ... | one-man band |