| Roman Tomes & Markéta Irglová: Máj | 2016 | Actress | Girl |
| Charlie Straight feat. Markéta Irglová: I Sleep Alone | 2013 | Actress | Singer |
| The Simpsons | 2009 | Actress | Irish Girl (voice) |
| Once | 2006 | Actress | Girl (as Marketa Irglova) |
| Utek | 2025 | Composer | Composer |
| The Long Wet Grass Short | 2018 | Composer | Composer (original score) |
| Home Is Here | 2016 | Composer | Composer (4976) |
| The Swell Season | 2011 | Composer | Composer |
| Once | 2006 | Composer | Composer |
| The Long Wet Grass Short | 2018 | Music Department | music producer: produced by |
| Strangers | 2007 | Music Department | vocals |
| The Last Man on Earth | 2016–2018 | Soundtrack | performer: "Falling Slowly" |
| Believer | 2018 | Soundtrack | lyrics: "FALLING SLOWLY" |
| Thomas Sanders | 2017 | Soundtrack | lyrics: "Broken Hearted Hoover Fixer Sucker Guy" |
| Miluji te modre | 2017 | Soundtrack | performer: "This Right Here" |
| Roman Tomes & Markéta Irglová: Máj | 2016 | Soundtrack | performer: "Máj" |
| Roman Tomes & Markéta Irglová: Máj Making of | 2016 | Soundtrack | performer: "Máj" |
| The Tonight Show Starring Jimmy Fallon | 2016 | Soundtrack | writer: "Falling Slowly" |
| Strictly Come Dancing | 2015 | Soundtrack | writer: "Falling Slowly" (uncredited) |
| Som dones TV Series | 2015 | Soundtrack | performer: "Falling Slowly" |
| The 67th Annual Tony Awards | 2013 | Soundtrack | writer: "When Your Mind's Made Up" |
| Smash | 2013 | Soundtrack | writer: "If You Want Me" (uncredited) |
| Charlie Straight feat. Markéta Irglová: I Sleep Alone | 2013 | Soundtrack | lyrics: "I Sleep Alone" |
| Actua TV Series | 2013 | Soundtrack | performer: "Falling Slowly" |
| So You Think You Can Dance | 2012 | Soundtrack | music: "Leave" |
| The Odd Life of Timothy Green | 2012 | Soundtrack | performer: "This Gift" |
| The 66th Annual Tony Awards | 2012 | Soundtrack | lyrics: "Gold" |
| Parenthood | 2011 | Soundtrack | performer: "Falling Slowly " (uncredited) |
| Once, pequeño gran éxito | 2008 | Soundtrack | performer: "Falling Slowly" |
| Uvolnete se, prosím | 2008 | Soundtrack | lyrics: "Fantasy man" |
| The 80th Annual Academy Awards | 2008 | Soundtrack | performer: "Falling Slowly" |
| 2008 Film Independent's Spirit Awards | 2008 | Soundtrack | performer: "When Your Mind's Made Up" |
| Once | 2006 | Soundtrack | performer: "Song Without Words (Venetian Boat Song, Op.30, No.6)", "Falling Slowly", "If You Want Me", "When Your Mind's Made Up", "The Hill" |
| Beauty in Trouble | 2006 | Soundtrack | performer: "Falling Slowly" |
| 30. Ceský lev TV Special | 2023 | Self | Self |
| Na plovárne | 2021 | Self | Self |
| Gen: Galerie elity národa | 2018 | Self | Self |
| Roman Tomes & Markéta Irglová: Máj Making of | 2016 | Self | Markéta Irglová |
| Show Jana Krause | 2012 | Self | Self |
| Cristel's 60th | 2011 | Self | Self |
| Krásný ztráty | 2011 | Self | Self |
| Vsechnopárty | 2011 | Self | Self |
| The Swell Season | 2011 | Self | Self |
| The Bonnie Hunt Show | 2010 | Self | Self (as The Swell Season) |
| The Swell Season: One Step Away | 2009 | Self | Self |
| Live from the Artists Den | 2008 | Self | Self |
| Once: The Swell Season en concierto TV Special | 2008 | Self | Self |
| Once, pequeño gran éxito | 2008 | Self | Self |
| Later... With Jools Holland | 2008 | Self | Self (also Interview) |
| Cinema 3 | 2008 | Self | Self |
| Uvolnete se, prosím | 2008 | Self | Self |
| The 80th Annual Academy Awards | 2008 | Self | Self - Winner & Performer |
| 2008 Film Independent's Spirit Awards | 2008 | Self | Self - Performer |
| The Tonight Show with Jay Leno | 2007–2008 | Self | Self |
| Last Call with Carson Daly | 2007–2008 | Self | Self |
| Listen Up! Live @ NGTV TV Series | 2007 | Self | Self - Musical Guest |
| Eigo de shabera-night | 2007 | Self | Self |
| Late Show with David Letterman | 2007 | Self | Self - Musical Guest (as Marketa Irglova) |
| The Late Late Show with Craig Ferguson | 2007 | Self | Self |
| Up Close with Carrie Keagan | 2007 | Self | Self |
| Reeling in the Years | 2010 | Archive Footage | Self (archive footage, uncredited) |