"We're wearing Valentino," Wilde joked to Ryan Seacrest on the red carpet about her high-necked black gown with a streak of white in the back, which she paired with a white clutch and Lorraine Schwartz jewelry.
Wilde, who is expecting a boy with fiancé Jason Sudeikis, also talked about how the couple remember their baby's due date – which is just two months away, on May 4.
"May the fourth be with you," they said together.
Wilde has also been having a lot of fun flaunting her growing belly.
She recently posted a playful photo on her Instagram account with the caption: "Sure I've looked like this after Mexican food but this time it's a BABY."
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