New Line is still booking their Vacation sequel, and they’re bringing Thor and the Night Man along for the ride.

The studio announced that Thor: The Dark World star Chris Hemsworth and It’s Always Sunny in Philadelphia co-creator and star Charlie Day are joining the cast of the travel comedy. The film would be a followup to the National Lampoon Vacation films, with Ed Helms (The Office) playing Rusty Griswold, son of Chevy Chase’s Clark Griswold in the original series. Curse road trips seem to be hereditary, as Rusty takes his family on one that

According to The Hollywood Reporter, Hemsworth would play the improbably-named Stone Crandall, husband to Audrey, Rusty Griswold’s sister. No idea how meaty his role in the film would be, but Vacation would be the first comedy feature for Hemsworth, who’s been picking up a lot of drama and action roles since Thor hit the theaters of Midgard.

Audrey hasn’t been cast yet, but previously, she was played by Juliette Lewis, Dana Baron, Dana Hill, and Marisol Nichols. Previous Rustys have included Ethan Embry, Jason Lively, Anthony Michael Hall, and Johnny Galecki. Christina Applegate will play Rusty’s wife with Chevy Chase and Beverly D’Angelo stopping by for cameos.

Day will play a river rafting guide, one who will presumably have a loud mini-freakout at the Griswold clan. Or they could be casting against type, but you don’t cast Charlie Day unless you want some yellin’.

The film is the directorial debut of John Francis Daley and Jonathan Goldstein, who are also writing the script.

Vacation starts shooting in September. Are you excited to take a trip with the Griswolds again? Let us know in the comments below.

[Source: The Hollywood Reporter]