With which film did Todd Philips enjoy his breakthrough?

Explanation

Todd Philips is the master of youth comedies and has films such as 'The Hangover', 'Old School' and 'Due Date' on his CV. He breakthrough came in 2000 with the film 'Road Trip'. Quickly afterwards, he directed the college comedy 'Old School', featuring Will Ferrel. His biggest success to date is the film 'Due Date', in which Robert Downey Jr., amongst others, can be seen. In the credits of every film he has directed, the picture is addressed as 'A Todd Phillips Movie'.