Search found 1 match: Simon Pegg

I suppose you don't mean "Paul" (2011)?

http://www.imdb.com/title/tt1092026
https://www.criticker.com/film/Paul/

The girl that Simon Pegg (he's a redhead, right?) falls in love with wasn't an alien though (unless Creationists count as such), but still the film is quite desert-y and yes they're looking for alien Paul's space ship. Also, I didn't get what you meant about the Volkswagen but maybe this could be of help: http://www.imcdb.org/movie_1092026-Paul.html (yeah I didn't know this site existed either).