10 Most Unconvincing Accents by Actors and Actresses in Film History

Keira Knightley in Atonement (2007). Knightley's attempts at a Southern English accent in this period drama were widely mocked.

Scarlett Johansson in Lost in Translation (2003). Johansson's Japanese accent in this Sofia Coppola film was also met with criticism.

Tom Cruise in Far and Away (1992). Cruise's Irish accent in this historical drama was so bad that it was even parodied on Saturday Night Live.

Angelina Jolie in Alexander (2004). Jolie's Greek accent in this historical epic was another major misfire.

Kevin Costner in Robin Hood: Prince of Thieves (1991). Costner's English accent in this Robin Hood movie was so bad that it inspired the creation of the term "Costnerization."

John Wayne in The Conqueror (1956). Wayne's Mongolian accent in this historical epic was so bad that it is said to have contributed to his death from cancer.

Meryl Streep in Mamma Mia! (2008). Streep's Swedish accent in this musical comedy was not entirely convincing, but it was still better than some of the other accents on this list.

Hugh Grant in Notting Hill (1999). Grant's cockney accent in this romantic comedy was a bit too polished for some viewers.

Julia Roberts in Pretty Woman (1990). Roberts' Southern accent in this romantic comedy was also a bit too polished for some viewers.