Helberg held up a sign that read “Refugees Welcome,” and his wife wrote “Let them in” across her chest.
The pair posed together on the red carpet with their signs, protesting the travel ban that President Donald Trump put in place, banning refugees of seven Muslim-majority nations from entering the United States.
Helberg and Towne were the first couple to address the ban on the red carpet during the 2017 SAG Awards.
The duo received praise from Mayim Bialik, who also stars on the hit sitcom.
Bialik came forward last week to vow that if Trump carries through with his campaign promise to create a federal registry of U.S. Muslims, she’ll register as Muslim in solidarity. The actress — who is Jewish — tweeted her vow last Wednesday.
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Helberg has been a frequent Trump critic on Twitter.
Big Bang Theory was nominated for a Screen Actors Guild Award for outstanding performance by an ensemble in a comedy series.
Ashton Kutcher opened Sunday’s SAG Awards ceremony by welcoming everyone watching at home and then saying angrily, “… and everyone in airports that belong in my America.” Kutcher’s reference to immigration restrictions imposed by Trump drew thunderous applause. (Kutcher’s wife, Mila Kunis, came to the U.S. under refugee status.)
Celebrities have been speaking out against Trump after he signed the executive order that effectively banned dozens of refugees from Syria, Iraq and other banned countries. Many people were detained at U.S. airports over the weekend, spurring mass protests in major cities and airports.
With files from The Associated PressFollow @KatieScottNews
© 2017 Global News, a division of Corus Entertainment Inc.