Paul Bettany attends the ‘Avengers: Infinity War’ fan event in London April 9, 2018. — Reuters pic

Sebastian Stan attends the ‘Avengers: Infinity War’ fan event in London April 9, 2018. — Reuters pic

Letitia Wright attends the ‘Avengers: Infinity War’ fan event in London April 9, 2018. — Reuters pic

Actor Elizabeth Olsen attends the ‘Avengers: Infinity War’ fan event in London April 9, 2018. — Reuters pic

Actor Tom Holland attends the ‘Avengers: Infinity War’ fan event in London April 9, 2018. — Reuters pic

Actor Benedict Cumberbatch attends the ‘Avengers: Infinity War’ fan event in London April 9, 2018. — Reuters pic

Actor Tom Hiddleston attends the ‘Avengers: Infinity War’ fan event in London April 9, 2018. — Reuters pic

Cast members attend the ‘Avengers: Infinity War’ fan event in London April 9, 2018. — Reuters pic

Cast members and cosplayers pose for a picture at the ‘Avengers: Infinity War’ fan event in London April 9, 2018. — Reuters pic