It’s been a while since there was an update on the long in-the-works Vacation reboot starring Ed Helms as Rusty Griswold, but today THR reports that the film just added two big stars. Chris Hemsworth and Charlie Day are both currently in negotiations to join the reboot; Hemsworth will play the husband of Rusty’s sister Audrey (who has not yet been cast) while Day will make a cameo as a river rafting guide. The reboot’s previously announced cast includes Christina Applegate as Rusty’s wife as well as original Vacation couple Chevy Chase and Beverly D’Angelo in cameo roles. The film is set to begin shooting next month.