Paramount Pictures is giving a glimpse of the new film IF. The studio shared a teaser trailer for the flick yesterday featuring Ryan Reynolds. IF is a live-action and animated fantasy comedy written and directed by John Krasinski. The film follows a young girl (Cailey Fleming) "who discovers that she can see everyone's imaginary friends -- and what she does with that superpower -- as she embarks on a magical adventure to reconnect forgotten IFs with their kids." Krasinski, Fiona Shaw, Phoebe Waller-Bridge, Louis Gossett Jr., Emily Blunt, Matt Damon, Maya Rudolph, Jon Stewart, Bobby Moynihan, Sam Rockwell, Sebastian Maniscalco, Christopher Meloni, Richard Jenkins, Awkwafina and Steve Carell also star. The movie hits theaters in May.