Katharine McPhee and David Foster Smash 2024 Oscars Party Date Night

Originally appeared on E! Online

David Foster and Katharine McPhee hit all the right notes during their latest date night.

The couple—who tied the knot in 2019 and share 3-year-old son Rennie—didn't miss a style beat as they stepped out for the Elton John AIDS Foundation Oscars 2024 viewing party. (See every star here.)

For the March 10 event, held in West Hollywood, Calif., Katharine lit up the red carpet in a diamond-embellished gown that left little to the imagination with its completely sheer fabric. To add extra oomph, two black velvet bows dangled from the diamond spaghetti straps.

The Smash actress, 39, accessorized with a black jewel-shaped clutch, dainty drop earrings and nude sky-high heels. As for her glam? She opted for an old-Hollywood vibe, sweeping her hair into a deep side part and adding a voluminous wave to her bob cut.

David, 74, let his wife steal the spotlight as he chose a classic black-and-white tuxedo for the viewing party.

Red Carpet Couples Turning Oscars 2024 Into A Date Night

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This marks the pair's first Oscars party red carpet in four years after they attended the 2020 Vanity Fair Oscars event. At the time, they were about to celebrate their one-year wedding anniversary.

But now, five years into their relationship, the two have not only taken the stage and released music with one another, but they're parents to toddler Rennie.

As for what has made their marriage stronger than ever? Katharine shared the secret to their success.

"Therapy. A good therapist," Katharine exclusively told E! News in October. "Or that you just have someone in your life or another couple in your life that is helpful when there's discord, disagreements. I really feel like you can talk through most everything, but you have to have the language, the vocabulary to do that."

She added, "So that takes practice and self-awareness and having skills to facilitate those conversations."

They aren't the only couple to wow on the red carpet at Elton John's AIDS Foundation Oscars 2024 viewing party. Keep reading to see all of the swoon-worthy fashion.

<p>Tiffany Haddish</p>

<p>Heidi Klum</p>

<p>David Burtka & Neil Patrick Harris</p>

<p>Sophia Bush</p>

<p>Katharine McPhee</p>

<p>Michaela Jaé Rodriguez</p>

<p>Alexis Bledel</p>

<p>Paris Jackson</p>

<p>Ellie Goulding</p>

<p>Patricia Arquette</p>

<p>Zooey Deschanel & Jonathan Scott</p>

<p>JC Chasez</p>

<p>Janet McCormack & Eric McCormack</p>

<p>Bobby Berk</p>

<p>Nathalie Emmanuel</p>

<p>Chris Colfer</p>

<p>Frances Gladney & Smokey Robinson</p>

<p>Gigi Gorgeous & Nats Getty</p>

<p>Donatella Versace</p>

<p>Elizabeth Hurley</p>

<p>Julia Fox</p>

<p>Josephine Skriver</p>

<p>Lucien Laviscount</p>

<p>Melanie Lynskey & Jason Ritter</p>

For a full recap of the 2024 Oscars, don't miss E! News Monday, March 11, at 11 p.m.