Dax Shepard and Kristen Bell
Alberto E. Rodriguez/Getty
Vegan Las Vegas!
and Dax Shepard
stepped out for lunch at LBS Burger at the Red Rock Resort & Spa in Las Vegas on Saturday.
The Hit and Run
costars were also joined by Bell's parents.
"They were having a great time and were laughing together," an onlooker tells PEOPLE.
Bell and Shepard – who are vegan – both ordered the URTH burger, a house made vegan patty burger.
Bell paired her animal-free lunch with a side salad and water while Shepard snacked on waffle fries and a Diet Coke.
– Jennifer Garcia