Susan Sarandon and Piers Morgan feud over her cleavage

Susan Sarandon is very proud of her cleavage, thank you very much.

The actress got lots of flak after she wore just a black bra underneath a white blazer at Saturday's SAG Awards, and one of the unwanted comments was from TV personality Piers Morgan.

Morgan tweeted that it was inappropriate for Sarandon to wear the revealing outfit since she was presenting the In Memoriam segment of the show.

He wrote, "Would Susan Sarandon wear this to a funeral? No.It was thus horribly inappropriate for an In Memoriam tribute."

Sarandon waited until Thursday to respond, perhaps just so she could use the #tbt hashtag (it means Throwback Thursday).

She wrote, "Today's #TBT is dedicated to @piersmorgan," along with a photo of herself in just a bra from "The Rocky Horror Picture Show," in which she played Janet. The Oscar-winning actress even pinned the tweet to the top of her Twitter feed, making it the first tweet any of her fans see on her page.

Morgan seems to be basking in the attention. He wrote back, "Today's #TBT is dedicated to @SusanSarandon," which showed him lying mostly naked in front of a fire.

The "feud" has fueled many women to post photos of their own cleavage in solidarity with Sarandon. Both celebrities have been retweeting the cleavage posts.

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    Andrea is an entertainment producer at CBSNews.com