Life & Style can reveal that the gorgeous duo were spotted at Cut in LA where they did more than just eat dinner.
"Chris had his shirt unbuttoned down to his navel — everyone could see his bare chest," a fellow diner recalls to Life & Style. "And Elsa reached over and put her hand under his shirt!"
The pair noshed on steak and salads, and sipped on wine throughout the evening.
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And The Avengers star, 29, definitely showed a lot of love back to his lady, 36, with whom he has daughter India, 11 months.
"He had his hand on her behind as they walked out!" the eyewitness says. "The fire is definitely burning between these two."
Three months after they went public with their love, Chris and Elsa married in December 2010.
"Having the person that you love by your side, and starting a family with them, is the best thing that can happen to you in this life," the Fast Five actress has shared. "You can't ask for more."