MTV has announced that fans will be treated to scenes from Transformers: Revenge of the Fallen and Harry Potter and the Half-Blood Prince as stars from both casts will reveal the never-before-seen clips. Daniel Radcliffe, Emma Watson and Rupert Grint will give a sneak peek of Harry Potter and the Half-Blood Prince, while Megan Fox and director Michael Bay will show off some never before seen footage fromTransformers: Revenge of the Fallen. Shia LaBeouf is also confirmed to present a popcorn statue.

SNL’s Andy Samberg will host the 18th annual MTV Movie Awards, which air live at 9PM ET on May 31 from the Gibson Amphitheatre in Universal City.