February 13, 2012 — Paramount announces Michael Bay has signed a deal to make a fourth Transformers film.[1]
June 6, 2012 — During Transformers: The Ride – 3D coverage, LA Times reports Michael Bay as saying the film will have a whole new human cast and redesigned robots.[3]
June 21, 2012 — In another LA Times interview, Bay reveals that the film will not be a reboot as previously stated.[4]
October 18, 2012 — The logo is revealed at a Paramount presentation.[6]
November 8, 2012 — After a number of rumors suggest it, Bay casts actor Mark Wahlberg in the film.[7]
December 15, 2012 — Wahlberg confirms that filming of Transformers 4 will commence in May 2013. [8]
January 8, 2013 — Bay casts Irish American actor Jack Reynor in Transformers 4. [9]
March 20, 2013 — The Michigan Film Office announces the film series will return to Detroit,[10] and reveals plot details which are later debunked by Paramount Pictures.[11]
March 26, 2013 — Nicola Peltz is confirmed as a cast member via Bay's website.[12]
May 1, 2013 — Kelsey Grammer joins the cast as the lead villain named "Harold Attinger".[14]
May 6, 2013 — The Wrap confirms that Sophia Myles will play a scientist.[15]
May 18, 2013 — The name of Mark Wahlberg's character is revealed to be Flynn Vincent.
May 20, 2013 — Chinese actress Li Bingbing joins the cast.[16]
May 28, 2013 — Actor-Comedian T. J. Miller joins the cast as a mechanic who is the best friend of Wahlberg's character.[17] Filming begins at Monument Valley[18] and the alternate modes of two new Autobots are revealed on Michael Bay's website: a C7 Corvette Stingray[19] and a Bugatti Grand Sport Vitesse.[20]
May 29, 2013 — Optimus Prime's new alternate mode is officially revealed by Michael Bay as a custom-built semi-truck.[21]
May 30, 2013 — Bumblebee's new alternate mode is revealed on Michael Bay's website as a highly modified 1967 Camaro SS.[22]
May 31, 2013 — Hound is revealed as a new character for Transformers 4, transforming into a Medium Tactical Vehicle.[23]
June 7, 2013 — Another new vehicle for the film is revealed as a Lamborghini Aventador.[24]
June 12, 2013 — The Sonic RS Rally Car is revealed for the film.[25]
June 25, 2013 — The Pagani Huayra is revealed to appear in the film.[26]
June 28, 2013 — A Freightliner Argosy cab-over truck is revealed for the film.[27]
July 2, 2013 — A second alternate mode is revealed for Bumblebee in the form of a 2014 Concept Camaro.[28][29]
July 14, 2013 — Chinese actor-musician Han Geng is announced as being part of the cast.[30]
July 25, 2013 — After being spotted in Texas in June, actor Titus Welliver officially joins the cast.[31]
July 27, 2013 — The S.S. Columbia and the S.S. Ste. Clair have been spotted to be featured in the film.[32]
July 30, 2013 — Wahlberg's children have been cast.[33]
