By peoplestaff225
Updated August 21, 2007 03:10 PM

If you’re watching the Bourne Ultimatum closely enough, you might be able to see Matt Damon’s waistline expanding as the movie progresses. But don’t blame craft services, blame his 14-month-old daughter Isabella. According to Matt, a desire to spend time with the new baby trumped any desire to train for the demanding role of Jason Bourne.

The consequences, jokes Matt, were dire.

Isabella is the first child for Matt and his wife Luciana, who has a daughter — Alexia, 9 — from a previous relationship.

Source: People