They have been married for 13 years and share two children together.

And Robert Downey Jr. kept the spark alive over a date night with his stunning wife Susan Downey, 44, on Thursday.

The couple looked smitten holding hands as they left Maddox Gallery after checking out the Best Of British exhibit.

So in love: Robert Downey Jr. kept the spark alive over a date night with his stunning wife Susan Downey on Thursday

The Iron Man actor, 53, kept it rather casual for his romantic night out.

He sported a grey T-shirt, black sweater, sweatpants, trainers, and a pendant necklace.

While Robert put comfort first, his wife cut a chic figure in her patterned mini dress and suede ankle boots.

Robert married Susan in Amagansett, New York in August 2005, after first meeting on the set of Gothika.

These boots were made for walking! While Robert put comfort first, his wife cut a chic figure in her patterned mini dress and suede ankle boots

The couple have son Exton, six, and daughter Avri, three, together.

Robert also has 25-year-old son Indio from his previous marriage to Deborah Falconer.

Lately Robert has been juggling parenthood with filming the upcoming Avengers 4 movie.

Keeping it casual! He sported a grey T-shirt, black sweater, sweatpants, trainers, and a pendant necklace

Last month, Robert’s co-star Gwyneth Paltrow posted a snap of their lunch break on set.

Marvel has set a May 3, 2019 release date for Avengers 4, although it still isn’t clear when the full, official title will be revealed.

After that, Marvel will kick off Phase 4 just a few months later with Spider-Man: Far From Home, slated for release on July 5, 2019.