Cast (in credits order)
| David Walsh | ... | Self | |
| Rest of cast listed alphabetically: | |||
| Guillaume Canet | ... | Dr. Ferrari (archive footage) (uncredited) | |
| Elaine Cassidy | ... | Betsy Andreu (archive footage) (uncredited) | |
| Ben Foster | ... | Lance Armstrong (archive footage) (uncredited) | |
| Mark Little | ... | Rupert Guinness (archive footage) (uncredited) | |
| Chris O'Dowd | ... | David Walsh (archive footage) (uncredited) | |
