04/11/2012 at 10:00 AM EDT
A glowing Reese Witherspoon
walked into the Polo Lounge at the Beverly Hills Hotel flashing her signature smile en route to lunch with some gal pals. The pregnant actress
arrived in a sleeveless dress, looking very svelte with her baby bump
barely noticeable, according to an onlooker.
Witherspoon joined a group of about six girlfriends for lunch on the patio, and she was seated at the head of the table.
was greeted with a warm welcome of hugs, and she sat chatting with her friends for about two hours, smiling and laughing the entire time. Says the onlooker: "She seemed very relaxed and content."