The "Private Practice" star is a veteran of inaugural ceremonies, having attended President Obama's 2009 swearing-in, as well. Walsh, whose ABC show airs its final episode on Tuesday, campaigned for Obama both terms.

Walsh declared Monday's event "just as magical and amazing" as Obama's first inauguration. She raved about Secretary of State Hillary ClintonHillary Rodham ClintonArmed man arrested at DC pizzeria targeted by conspiracy theory Clinton opponents vow to continue their pursuit ExxonMobil CEO, retired admiral will meet with Trump about State: report MORE's black glasses and side-swept blonde hair-do, as well as the inaugural poet, Richard Blanco, who read his poem “One Today” during the morning ceremony.

“I heard not as many people were going to come this time,” she said of inauguration. “Well, I looked back and saw the same ocean of people that I saw last time, all waving their American flags, just as inspired. It’s the way I felt when I campaigned for him, especially this time, looking around at the rallies and who came out today. It’s a diverse and accurate portrait of America.”

Also spotted at the Impact reception were actress and "The Talk" host Aisha Tyler, chatting with Sen. Al FrankenAl FrankenDems press Trump to keep Obama overtime rule GOP wants to move fast on Sessions Overnight Cybersecurity: Lawmakers pushing for vote to delay warrant rule changes MORE (D-Minn.) early in the evening, "Rock of Ages" star Malin Akerman, MC Hammer of "U Can't Touch This" fame sporting sunglasses despite the dim ambiance, "One Tree Hill" star Sophia Bush, and North Carolina folk band Delta Rae.

The male members of Delta Rae, fresh from their headline performance at the Planned Parenthood/Rock the Vote party the night before, took the "black tie optional" invite seriously and showed up in jeans.

Updated Jan. 22 at 3:41 p.m.