Stockard Channing became a well known name after her appearance as the iconic Rizzo in the 1978 classic Grease.
She recently appeared on Lorraine and people were shcoked at how different she looked and took to Twitter to share their thoughts.
Channing was on the show to talk about the role that made her famous, 40 years on.
She added that she feels like the world’s “oldest living teenager” despite being 34 when she played a high schooler.
A cosmetic surgeon spoke to Daily Mail about Channing's look and said:
“We can speculate that this is a result of non-surgical interventions to her face. Her forehead remains smooth at 73 so we can assume she has undergone anti-wrinkle injections (Botox) which would also give the arched shape of her eyebrows.
“Her lips appear much fuller so it would lead us to believe that she has had lip filler injections to increase their size. The excess skin and fat around her jowls make her mouth look like it has dropped- if anti-wrinkle injections are placed incorrectly, they can cause puffiness and dropping of the skin. These effects should wear off in a few months.”
Channing is 73 years old.