2010 in production history

January

 * 11 January - Principal photography on Thor begins, Stuart Townsend drops out of his role as Fandral in the film and the role is taken by Joshua Dallas. Spider-Man 4 is officially cancelled and a reboot enters development.

March

 * 22 March - Chris Evans is cast as Captain America in Captain America: The First Avenger.

April

 * 2 April - Marvel Studios officially announces the casting of Evans as Captain America.
 * 26 April - Iron Man 2 has its premiere in Los Angeles, California.
 * 28 April - Iron Man 2 is released in France.

May

 * 6 May - Principal photography on Thor wraps and post-production officially begins.
 * 7 May - Iron Man 2 is released in the United States.
 * 28 May - James McAvoy is cast as Professor X in X-Men: First Class.

June

 * 17 June - Michael Fassbender and Benjamin Walker are respectively cast as Magneto and Beast in X-Men: First Class.
 * 28 June - Principal photography on Captain America: The First Avenger begins and Alice Eve is cast as Emma Frost in X-Men: First Class.

July

 * 7 July - Benjamin Walker drops out of his role as Beast in X-Men: First Class.
 * 8 July - Nicholas Hoult, Caleb Landry Jones and Lucas Till are respectively cast as Beast, Banshee and Havok in X-Men: First Class.
 * 22 July - Joss Whedon confirms that he is directing The Avengers.
 * 23 July - Mark Ruffalo and Jeremy Renner are respectively cast as Bruce Banner and Hawkeye in The Avengers.
 * 27 July - Edi Gathegi is officially cast as Darwin in X-Men: First Class.

August

 * 11 August - Henry Jackman is recruited as composer for X-Men: First Class.
 * 15 August - Rose Byrne is cast as Moira MacTaggert in X-Men: First Class.
 * 16 August - Oliver Platt is officially cast as the Man in Black in X-Men: First Class.
 * 17 August - Alice Eve drops out of her role as Emma Frost and Zoë Kravitz, Jason Flemyng, January Jones, Bill Milner, and Morgan Lily are respectively cast as Angel Salvadore, Azazel, Emma Frost, Magneto and Mystique and in X-Men: First Class.
 * 26 August - The incorporation of X-Men Origins: Magneto into X-Men: First Class is announced by Lauren Shuler Donner.

August

 * Principal photography on X-Men: First Class begins.