Rachel accompanied hubby Daniel to the premiere of his film The Girl With The Dragon Tattoo in Madrid on Wednesday.
The couple married in a secret ceremony in June in New York, after a whirlwind romance.
Daniel and Rachel worked together on Dream House, and both separated from their partners. Rachel was engaged to director Darren Aronofsky, and Daniel was engaged to Satsuki Mitchell.
They have shunned public appearances, but happily posed for pictures on the red carpet in Spain.
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Daniel has also revealed two "very personal" tattoos he had done to possibly mark his marriage.
He told GQ: "They're just part of a stage I'm in. You should see the rest of my body. Then you'd be intrigued. Oh boy. It's been a very complicated couple of years."
Looks like complication has given way to happiness now.
Talking about their wedding, Daniel said: "We did it privately. And I've got a lot of people to thank for that. But that was the point. We did it for private reasons. Because we didn't want it f***ed up, because that would be sharing a secret. And the whole point is that it was a secret. A secret is a secret in my mind."
He added: "I'm in love. I'm very happy. And that is as far as I'm prepared to go."
That's enough for us, Daniel.