# Whose Line Is It Anyway? (American TV series) season 15

The fifteenth season of the American television series Whose Line Is It Anyway? premiered on The CW on June 17, 2019, and concluded on September 23, 2019.

## Cast
### Main

* Aisha Tyler
* Ryan Stiles
* Colin Mochrie
* Wayne Brady

### Recurring

* Jonathan Mangum (three episodes)
* Brad Sherwood (two episodes)
* Greg Proops (two episodes)
* Jeff Davis (two episodes)
* Chip Esten (one episode)
* Gary Anthony Williams (one episode)
* Heather Anne Campbell (one episode)
Chip Esten, following two appearances as a special guest in seasons 13 and 14, returned as a recurring fourth performer for the first time since season eight.

## Episodes

The "winner(s)" of each episode – as chosen by host Aisha Tyler – are highlighted in italics. The winner(s) perform a sketch during the credit roll, just like in the original British series.
| No. overall | No. in season | Performers | Special guest | Original air date | Prod. code | U.S. viewers (millions) |
| 328 | 1 | Wayne Brady, Greg Proops, Colin Mochrie, Ryan Stiles | Chris Hardwick | June 17, 2019 (2019-06-17) | 713 | 1.05 |
| Games performed: Questions with Hats, Moving People (with audience members), Song Styles, Scenes from a Hat, Helping Hands |||||||
| 329 | 2 | Wayne Brady, Jeff Davis, Colin Mochrie, Ryan Stiles | Tinashe | June 24, 2019 (2019-06-24) | 709 | 0.90 |
| Games performed: Weird Newscasters, Song Styles, Dubbing, World's Worst, Living Scenery, Props |||||||
| 330 | 3 | Wayne Brady, Jonathan Mangum, Colin Mochrie, Ryan Stiles | none | July 1, 2019 (2019-07-01) | 720 | 0.87 |
| Games performed: Hollywood Director, Sound Effects (with audience members), Moving People (with audience members), Scenes from a Hat, Greatest Hits |||||||
| 331 | 4 | Wayne Brady, Chip Esten, Colin Mochrie, Ryan Stiles | Elizabeth Gillies | July 8, 2019 (2019-07-08) | 715 | 0.93 |
| Games performed: Weird Newscasters, Duet, Dubbing, Scenes from a Hat, Living Scenery, Hoedown |||||||
| 332 | 5 | Wayne Brady, Brad Sherwood, Colin Mochrie, Ryan Stiles | none | July 15, 2019 (2019-07-15) | 708 | 0.91 |
| Games performed: Questions with Hats, Award Show, World’s Worst, If You Know What I Mean, Sideways Scene, Greatest Hits |||||||
| 333 | 6 | Wayne Brady, Gary Anthony Williams, Colin Mochrie, Ryan Stiles | Adam Rippon | July 22, 2019 (2019-07-22) | 712 | 0.85 |
| Games performed: Dating App, Mixed Messages, Song Styles, World’s Worst, Living Scenery, Scenes from a Hat |||||||
| 334 | 7 | Wayne Brady, Heather Anne Campbell, Colin Mochrie, Ryan Stiles | none | July 29, 2019 (2019-07-29) | 605 | 0.94 |
| Games performed: Let’s Make a Date, Newsflash, Whose Line, Scenes from a Hat, Greatest Hits |||||||
| 335 | 8 | Wayne Brady, Jonathan Mangum, Colin Mochrie, Ryan Stiles | Chris Jackson | August 5, 2019 (2019-08-05) | 717 | 0.94 |
| Games performed: Weird Newscasters, Film Dub, Duet (with an audience member), Scenes from a Hat, Helping Hands |||||||
| 336 | 9 | Wayne Brady, Jeff Davis, Colin Mochrie, Ryan Stiles | none | August 19, 2019 (2019-08-19) | 701 | 0.94 |
| Games performed: Hollywood Director, Doo Wop, Secret, Scenes from a Hat, Greatest Hits |||||||
| 337 | 10 | Wayne Brady, Greg Proops, Colin Mochrie, Ryan Stiles | Adrienne Houghton | August 26, 2019 (2019-08-26) | 714 | 0.80 |
| Games performed: Weird Newscasters, Song Styles, Living Scenery, Scenes from a Hat, Greatest Hits |||||||
| 338 | 11 | Wayne Brady, Brad Sherwood, Colin Mochrie, Ryan Stiles | none | September 9, 2019 (2019-09-09) | 607 | 0.93 |
| Games performed: Questions with Hats, Props, Doo Wop, Sound Effects (with audience members), Scenes from a Hat, Greatest Hits |||||||
| 339 | 12 | Wayne Brady, Jonathan Mangum, Colin Mochrie, Ryan Stiles | none | September 23, 2019 (2019-09-23) | 703 | 0.67 |
| Games performed: Questions with Hats, Sound Effects (with audience members), Party Quirks, Scenes from a Hat, Greatest Hits |||||||