"And the sweet 17 of marriage — sublime!" Downey Jr. captioned an image with his eyes closed laying in his wife's lap, with Susan smiling softly while looking down at him. "After all these ...

producers Robert Downey Jr. and Susan Downey ... "And the sweet 17 of marriage — sublime!" Downey Jr. captioned an image with his eyes closed laying in his wife's lap, with Susan smiling softly ...

Downey Jr. captioned an image with his eyes closed laying in his wife's lap ... respond to PEOPLE's requests for comment. All About Robert Downey Jr.'s Late Dad, Robert Downey Sr.