Deborah Kerr was fabulous and outshined Ava Gardner...
I keep seeing posts about how hot Ava Gardner was, and what a great actress she was, and I'm not contesting any of that. But for me, Deborah Kerr was the clear standout of the film. A very nuanced portrayal of a character with many layers and hidden depths. (Ava's character also had hidden depths, but her performance was over-the-top.)
And while they were about the same age--44 and 43, respectively, I think Deborah looked about 10 years younger than Ava.