Stars Descend On London And Las Vegas, Clooney And Roberts Shoot In New York And The Internet Goes Mad For Some Momentous Trailers

Marvel's Avengers were out in force in London this week for the world premiere of the sequel Avengers: Age of Ultron. Walking the black carpet were stars Robert Downey Jr., Chris Evans, Chris Hemsworth, Scarlett Johansson, Mark Ruffalo, Jeremy Renner, Elizabeth Olsen, Aaron Taylor-Johnson, Paul Bettany and writer-director Joss Whedon.

More:  View the full set of pictures from The Avengers: Age of Ultron - UK film premiere here

Downey also gave a video interview, and later made the news when he walked out of a chat with a Channel 4 journalist who blatantly ignored instructions not to grill the actors about their personal lives. Click here to watch a rather more positive interview with Robert Downey Jr.

Meanwhile in Las Vegas, studios outdid themselves to bring their biggest stars to CinemaCon, which presents new films to cinema owners. Among others, the red carpet parade included Reese Witherspoon, Channing Tatum, Charlize Theron, Tom Hardy, Dwayne Johnson, Sofia Vergara, Henry Cavill, Joe Manganiello, Michael B. Jordan and the entire cast of the forthcoming Entourage movie.

More: View the pictures of 2015 CinemaCon here

In New York, Arnold Schwarzenegger and Joely Richardson turned out for the premiere of their new movie Maggie at the Tribeca Film Festival. It's a dark drama about a father trying to find the cure for a zombie disease that has infected his daughter, played by Abigail Breslin. The film opens next month in America and in July in Britain.

More: View the photos from the 2015 Tribeca Film Festival - 'Maggie' here

Also in New York, photographers caught George Clooney, Julia Roberts, Jack O'Connell and director Jodie Foster on location filming Money Monster. It's a black comedy about a guy who kidnaps the TV financial guru he blames for losing his life savings.

More:  View images of George Clooney, Julia Roberts, Jodie Foster, and Jack O'Connell on the set filming 'Money Monsters' here

Ripples are still being felt around the world over the biggest trailer ever released online. It's the second teaser for Star Wars Episode VII: The Force Awakens, which opens in December. And fans picked it apart frame by frame, especially celebrating the voiceover by Mark Hamill, the appearance of Darth Vader's charred helmet and an appearance by Harrison Ford as Han Solo. Watch it again. Click here to watch the Star Wars Episode VII: The Force Awakens trailer

There's also a new trailer for this summer's reboot of Fantastic Four, directed by Josh Trank (Chronicle) and starring Miles Teller, Michael B. Jordan, Kate Mara and Jamie Bell as four young scientists who are physically altered when an experiment goes wrong. It looks more serious than the previous two films: darker, intense and grounded. It opens in August. Click here to watch the Star Fantastic Four trailer

And an internet leak of the first teaser for Batman v Superman: Dawn of Justice convinced the studio to release a proper high definition version, giving us a glimpse of the film nearly a year before it opens next March. It's an extremely bleak and gritty clip, showing how opinion has turned against the Man of Steel (Henry Cavill), leading to the rise of the Dark Knight (Ben Affleck). It'll be a long wait for the movie. Click here to watch the Batman v Superman: Dawn of Justice  trailer