Ashton Kutcher, Mila Kunis

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Mila Kunis and Ashton Kutcher attended the Sixth Annual Breakthrough Prize Ceremony on Sunday—making it their first red carpet appearance together since appearing on That 70's Show

The Bad Moms actress wore a Dolce & Gabbana dress featuring a full, floral skirt and a sheer black top. Her hubby donned a classic black tuxedo and bowtie.

While posing for pictures on the red carpet, Kutcher lovingly put his arm around his wife and told her something that made her chuckle.

The stars have been married for two years and share two children: Dimitri, 1, and Wyatt Isabelle, 3.

Known as the "Oscars of Science," the 2018 Breakthrough Prizes celebrated the top achievements in physics, life sciences and mathematics. The event was held at the NASA Ames Research Center in Silicon Valley and welcomed stars and scientists, alike. Morgan Freeman served as the ceremony's host and Wiz Khalifa gave a live performance.

To see which other stars attended the event, check out the gallery:

Morgan Freeman

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Wiz Khalifa, Izabela Guedes

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ESC: Best Dressed, Kerry Washington

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Mayim Bialik

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Lily Collins

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Kara McCullough

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Ashton Kutcher, Mila Kunis

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A combined total of $22 million was awarded at the evening's gala.

For more celebrity news, watch E! News at 7 and 11 p.m.

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