Seth Rogen is planning to bring back movie hits Superbad and Pineapple Express with one cross-over sequel.

Rogen and Evan Goldberg creation Superbad was a box office hit in 2007, grossing $162 million off a relatively small $20 million budget.

Stoner comedy Pineapple Express is heading for similar heights, having already taken double its $25 million budget in just a week at the global box office.

And Rogen's co-star in the movie, James Franco, reveals studio bosses are leaning on the 26 year old to write follow ups for both.

Franco tells MTV, "Even before Superbad came out, I think the studio was trying to get (Seth Rogen and Evan Goldberg) to write a sequel, but they really didn't want to write a sequel. And so, an answer to that was to do a Superbad/Pineapple Express crossover, an unprecedented crossover movie with two directors, Greg Motolla and David Gordon Green, each directing half of the movie and somehow these characters get together, which doesn't make sense at all, but could work."