The WhatsOnStage Awards, or alternatively, the WhatsOnStage "theatregoers' choice" prizes, formerly known as the Theatregoers' Choice Awards, are organised by the theatre website WhatsOnStage.com. The awards recognise performers and productions of British theatre with an emphasis on London's West End.
In early 2001, WhatsOnStage.com published the shortlists for that year’s Laurence Olivier Awards and invited site visitors to vote online for who they thought should win. In a fortnight, 5,000 people took part – and their results differed wildly from the Olivier judges. For the 2002 Awards, the editors compiled their own shortlists and in 2003, they held their first Launch Party to announce the shortlists to about 200 industry guests. The first Awards Concert and ceremony was introduced for the 2008 Awards.
Each year, the Awards shortlists are drawn up with the help of thousands of theatregoers who log on to nominate their favourites across all 20+ awards categories. Nominations are announced at a star-studded launch event held in early December. Voting then opens and runs until the end of January the following year. In 2012/13, over 60,000  theatregoers logged on to vote, with leaders in many categories fluctuating dramatically from day to day.
The 19th Annual WhatsOnStage Awards concert and ceremony took place on Sunday, 3 March 2019 at the Prince of Wales Theatre.
The 18th Annual WhatsOnStage Awards concert and ceremony took place on Sunday, 25 February 2018 at the Prince of Wales Theatre.
Previous presenters of the WhatsOnStage Awards include James Corden, Sheridan Smith, Christopher Biggins, Mel Giedroyc, Miranda Hart, Alan Davies, Jenny Eclair, Rufus Hound, Steve Furst, Vikki Stone and Simon Lipkin.
Over the years, guest presenters and performers at the Launch Party have included Graham Norton, Elaine Paige, Michael Ball, Lesley Garrett, Ryan Molloy, James Earl Jones, Jools Holland, Patina Miller, Julian Clary, Jeremy Irons, Simon Russell Beale, Bertie Carvel and Meera Syal.
West End stars who have performed at the Awards Concerts at the Prince of Wales have included Alfie Boe, Sally Ann Triplett, Ryan Molloy, Jodie Prenger, Hannah Waddingham, Leanne Jones, Jill Halfpenny, Hadley Fraser, Ramin Karimloo, Rosemary Ashe, Nancy Sullivan, Samantha Barks, Sarah Lark, Kim Criswell, Siobhan McCarthy, Julie Atherton, Suranne Jones, Elena Roger, Sean Palmer, Clare Foster, Hannah Waddingham, Dean Chisnall, Brian May, Kerry Ellis, Tim Minchin and Melanie Chisholm.
The Concert is produced by Stuart Piper, on behalf of WhatsOnStage.
The inaugural Launch Party was held at The Venue, before moving to the Dominion Theatre in 2004, Planet Hollywood in 2005 and 2006, and Café de Paris, where it has been every year since with the exception of the 2009 Awards, when it was held at the London Hippodrome as part of their campaign to save the venue as a performance space.
The first Awards Concert and ceremony was introduced for the 2008 Awards and was held at the 960-seat Lyric Theatre. The Concert moved to the 1,100-seat Prince of Wales Theatre for the 2009 Awards and was a sell-out for four straight years - 2009, 2010, 2011 and 2012. The concert moved to the Palace Theatre for the 2013 awards but returned to the Prince of Wales Theatre for 2014.
- Best Actress in a Play: Olivia Colman for Mosquitoes
- Best Actor in a Play: David Tennant for Don Juan in Soho
- Best Supporting Actress in a Play: Juliet Stevenson for Hamlet
- Best Supporting Actor in a Play: Fre Fee for The Ferryman
- Best Actress in a Musical: Carrie Hope Fletcher for The Addams Family
- Best Actor in a Musical: John McCrea for Everybody's Talking About Jamie
- Best Supporting Actress in a Musical: Lucie Shorthouse for Everybody's Talking About Jamie
- Best Supporting Actor in a Musical: Ross Noble for Young Frankenstein
- Best New Play: The Ferryman
- Best New Musical: Everybody's Talking About Jamie
- Best Play Revival: Hamlet
- Best Musical Revival: 42nd Street
- Best Director: Sam Mendes for The Ferryman
- Best Set Designer: Douglas W, Schmidt for 42nd Street
- Best Lighting Designer: Patrick Woodroffe for Bat Out of Hell
- Best Video Design: 59 Productions for An American in Paris
- Best Choreographer: Randy Skinner for 42nd Street
- Best Off West End Production: Hair, The Vaults
- Best Regional Production: Sunset Boulevard, National tour
- Best Original Cast Recording: Les Misérables
- Best Show Poster: Harry Potter and the Cursed Child
- Best West End Show: Harry Potter and the Cursed Child
- Equity Award for Services to Theatre: Sonia Friedman
- "Home - 16th Annual WhatsOnStage Awards". Retrieved 11 December 2015.
- David Lister (19 March 2001). "Theatregoers rage at stars who fail to light up stage". The Independent. Retrieved 13 February 2009.
- Chris Johnson (9 February 2009). "Yes, We're Back Together and it's Going Brilliantly". The Daily Mail. Retrieved 13 February 2009.
- Claire Allfree (18 February 2013). "Stephen Fry leads star-studded list in WhatsOnStage.com Awards". The Independent. Retrieved 19 November 2013.
- Snow, Georgia (3 March 2019). "WhatsOnStage Awards 2019: the winners in full". The Stage. Retrieved 17 June 2019 – via www.thestage.co.uk.
- "Whatsonstage Awards History". Whatsonstage.com, accessed 19 November 2013
- "Hairspray and Equus sweep theatre awards". The Guardian. 22 February 2008. Retrieved 20 November 2013.
- "Donmar and Jersey Boys Dominate Theatregoers' Choice Awards". Official London Theatre. 15 February 2009. Retrieved 20 November 2013.
- "Rachel Weisz and Jude Law win at Whatsonstage Awards". The Stage. 14 February 2010. Retrieved 20 November 2013.
- "Winners 2011". West End Theatre. 21 February 2011. Retrieved 20 November 2013.
- "Full List Of 2012 Whatsonstage.com Award-Winners". Broadway World. 19 February 2012. Retrieved 20 November 2013.
- "Sweeney Todd, Sheridan Smith And Stephen Fry Big Winners At Whatsonstage.com Awards". Huffington Post. 18 February 2013. Retrieved 20 November 2013.
- "What would Harry Potter say? Daniel Radcliffe sports long flowing mane as he and Rupert Grint win gongs at What'sOnStage Awards". Mailonline. 23 February 2014. Retrieved 26 February 2014.
- "Miss Saigon dominates WhatsOnStage awards". BBC. 15 February 2015. Retrieved 26 February 2015.
- "Benedict Cumberbatch's Hamlet takes quartet at WhatsOnStage awards". theguardian.com. 21 February 2016. Retrieved 17 February 2017.
- "Billie Piper and Jamie Parker win top prizes at WhatsOnStage Awards". The Stage. 19 February 2017. Retrieved 18 April 2018.
- "WhatsOnStage Awards 2018: Winners in full". The Stage. 25 February 2018. Retrieved 18 April 2018.
- "Archive". Retrieved 11 December 2015.