O

- Oklahoma! (Broadway 1943)

- Oklahoma! (London 1998)

- Oliver! (London 1960)

- Oliver! (Studio 1962)

- Oliver! (London 1991)

- Oliver! (Madrid 1997)

- Oliver! (Madrid 1999)

- Oliver! (Czechia 2002)

- Oliver! (London Revival 2009)

- Oliver Twist (Hamburg 2015)

- Oliver Twist (Paris 2016)

- On The Record (Broadway 2007)

- On The Town (London 1963)

- On The Town (Studio 1995)

- On the Town (Broadway 2015)

- On the Twentieth Century (Broadway 2015)

- On Your Feet (Broadway 2016)

- On Your Toes (Studio 1952)

- On Your Toes (Broadway 1954)

- On Your Toes (Broadway Revival 1983)

- Once On This Island (Broadway 1990)

- Once On This Island (London 1994)

- Once On This Island (Broadway Revival 2017)

- Once Upon a Mattress (Broadway 1959)

- Once Upon a Mattress (London 1960)

- Once Upon a Mattress (Broadway 1997)

- One Man, Two Guvnors (Broadway 2012)

- Ordinary Days (Broadway 2009)

- Orpehus & Euridice (Off-Broadway 2006)

- Oropeus & Euridice (Off-Broadway Revival 2011)

- OST Side Story (Zürich 2015)

- Over Here! (Broadway 1974)