Deschanel, 34, looked smitten with her film producer boyfriend as they walked arm in arm on the red carpet. The 'New Girl' actress wore a pink column gown by Oscar de la Renta and kept her brunette locks down, reported Us magazine.
As previously reported, the actress was photographed locking lips with Pechenick during a hike in LA last week.
The relationship comes just weeks after it was confirmed that Deschanel split from boyfriend Jamie Linden after two years of dating.