Short answers, pulled from the story.
Transformers: Dark of the Moon grossed $1.124 billion worldwide, with $352.3 million in North America and $771.4 million internationally. At the time of its release it was the fifth highest-grossing film in history and the second highest-grossing film of 2011.
Megan Fox did not reprise her role due to a dispute with the production. Published accounts attributed the decision to executive producer Steven Spielberg, reportedly in response to Fox comparing director Michael Bay to Adolf Hitler, though Fox's representatives said the departure was her own choice. Bay later claimed Spielberg told him to fire her; Spielberg denied that account.
Sentinel Prime was voiced by Leonard Nimoy, best known for originating the role of Spock in Star Trek. Nimoy had also voiced the villain Galvatron in the 1986 animated Transformers film, making his casting a reference to two separate Transformers histories. ILM based Sentinel Prime's face initially on Sean Connery before adjusting it to incorporate Nimoy's physical performance.
The film was shot across multiple locations including Chicago, Los Angeles, Washington D.C., Moscow, Florida, Indiana, Milwaukee, Houston, and Cambodia's Angkor Wat temple complex. Northwest Indiana, specifically Gary, stood in for Ukraine during the Chernobyl sequence. Principal photography ran from the 18th of May, 2010, through the 9th of November, 2010.
The reported production budget was $195 million, with $30 million of that attributed specifically to 3D filming costs. North American promotional costs came to approximately $75 million.
The film received Academy Award nominations for Best Sound Editing, Best Sound Mixing, and Best Visual Effects. It also won the Empire Award for Best 3D and was named Favorite Movie and Favorite Action Movie at the People's Choice Awards. At the same time, it was nominated for multiple Razzie Awards including Worst Picture, Worst Director for Michael Bay, and Worst Screenplay for Ehren Kruger.