He originally wasn't keen to reprise Clark for an Ed Helms-starring reboot
"Incredible Burt Wonderstone" writers John Francis Daley and Jonathan Goldstein wrote the screenplay and are due to make their directorial debuts on the movie
Cameoing as Clark and Ellen Griswold in New Line's reboot of the 1984 comedy
Ed Helms is playing Rusty Griswold, with Chevy Chase and Beverly D'Angelo likely to make appearances
Chevy Chase and Beverly D'Angelo will be approached to reprise their roles of Clark and Ellen Griswold in the film.
"We've been warned not to screw up"
John Francis Daley and Jonathan Goldstein resurrect the Griswolds