Sinden was a leading figure in the fight to launch the Theatre Museum in London's Covent Garden in the 1980s. In 2007, Sinden embarked on a UK, European and American theatre tour to talk about his life, work and anecdotes in "An Evening with... Sir Donald Sinden". Produced by his son Marc, this included, on 8 November 2007 as part of Marc's "British Theatre Season, Monaco", a performance in front of Prince Albert of Monaco (the son of Grace Kelly, his co-star in the film "Mogambo") at the Théâtre Princesse Grace, Monte Carlo.