- 2007: Wrote and directed an adaptation of the first book of His Dark Materials trilogy, "The Golden Compass"
- 2006: Produced "American Dreamz" a political satire helmed by his brother Paul Weitz
- 2005: Acted in "Mr. and Mrs. Smith," starring Brad Pitt and Angelina Jolie
- 2002: Along with brother Paul and Peter Hedge wrote "About a Boy"; received an Oscar nomination for Adapted Screenplay
- 2001: Reteamed with brother Paul to co-direct "Down to Earth," a remake of "Heaven Can Wait" starring Chris Rock; also contributed to the screenplay
- 2001: Will direct the film version of Philip Pullman's popular children's fantasy series "His Dark Materials" (lensed 2005)
- 2000: Co-starred opposite Mike White in "Chuck & Buck," directed by Miguel Arteta; screened at Sundance Film Festival
- 1999: Produced the teen comedy "American Pie," directed by brother; reportedly co-directed
- 1998: Co-wrote (with brother) an episode of the ABC remake of the series "Fantasy Island"
- 1998: Along with brother and Todd Alcott, credited for the screenplay of the animated comedy "Antz"
- Joined the diplomatic corps, but was required to wait a year after passing foreign service exams before beginning tenure
- Worked as a freelance journalist for British newspapers The Independent and the London Sunday Times after completing his English degree at Cambridge University
- With Paul, worked on the screenplay for the children's film "Madeline," produced by uncle Pancho Kohner
- While waiting for clearance to join diplomatic corps, began collaborating with older brother Paul on a screenplay




