Thomas Anthony Hollander (born 25 August 1967) is an English actor. He began his career in theatre, winning the Ian Charleson Award in 1992 for his performance as Witwoud in The Way of the World at the Lyric Hammersmith Theatre. He is known for his roles in comedic films such as Pirates of the Caribbean and In the Loop and drama films such as Enigma, Pride & Prejudice, Gosford Park, and Hanna. He played the lead role in the sitcom Rev., which won the British Academy Television Award for best sitcom in 2011. He also played the lead in the ITV's Doctor Thorne and won the BAFTA Television Award for Best Supporting Actor for his role as Major Lance "Corky" Corkoran in the BBC series The Night Manager.

He appeared as Henry Carr in a revival of Tom Stoppard's play Travesties at the Apollo Theatre in London, directed by Patrick Marber. The play transferred to the West End, with the same cast, after its sell-out run at the Menier Chocolate Factory (September to 19 November 2016) and ran until 29 April 2017. Hollander was nominated for an Olivier Award for Best Actor for his role in Travesties and the production as a whole was nominated in five categories (Best Actor, Best Revival, Best Sound Design, Best Actress in a Supporting Role and Best Actor in a Supporting Role). Marber's revival transferred to Broadway in 2018, with Hollander reprising his leading role as Carr. The play opened on 24 April 2018 (previews 29 March) at the Roundabout Theatre Company's American Airlines Theater in New York. Hollander received a Tony Award nomination for the production. Hollander appears as Dr. Sorgh in the film Tulip Fever which was released in September 2017. The screenplay, also by Stoppard, is an adaptation of Deborah Moggach's historical novel. He also appears as Garin in Terry George's historical drama The Promise, his third collaboration with George, who also directed him in Some Mother's Son and Whole Lotta Sole.

In January 2016, he became an Honorary Fellow of Selwyn College, Cambridge (his former college).