The actress is part of a star-studded cast in the new Garry Marshall romantic comedy, which includes Julia Roberts, Jennifer Garner, Jessica Alba, Ashton Kutcher and Bradley Cooper.
And one particular day of filming left Biel buzzing around on set.
She says, "We shot both scenes on the same day. So in the morning I ate about 10 doughnuts; in the afternoon I ate about 18 or 20 chocolates. I was on a sugar high for days, it was crazy!"