Oliver Hudson Is ‘Super Excited’ About Pregnant Sister Kate’s Daughter on a Way

Oliver Hudson can’t wait to accommodate his new niece.

The Splitting Up Together star, 41, non-stop adult to PEOPLE Tuesday night during the ABC and Freeform Upfronts Party, hold during Tavern on a Green in N.Y.C., and certified everybody is stoked about his profound sister Kate Hudson‘s baby daughter on a way.

“I was there!” he pronounced of a whack where Kate, beloved Danny Fujikawa and her sons Bingham Hawn, 6½, and Ryder Russell, 14, suggested a little lady was on a way. “I had no time to conflict since Bing, her other kid, had a blade in his palm — he was popping a balloon and we was holding him.”

“The balloon goes bang and it’s a lady though afterwards Bing is arrange of using with a blade and I’m like, ‘Get over here!’ ” a actor recalls. “And perplexing to get a knife, so we had no time to indeed applaud until maybe 15 seconds later. we was super excited. We are all so happy it’s a girl!”

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Oliver and Kate Hudson

Oliver Hudson

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Oliver — father to daughter Rio Laura, 4½, and sons Bodhi Hawn, 8, and Wilder Brooks, 10 — tells PEOPLE Kate, 39, is “fierce” and doesn’t need any parenting recommendation from her large brother.

“She loves my daughter and is with my daughter all a time,” says a former Scream Queens star. “Rio is sleeping over during my sister’s residence all a time.”

“Rio looks adult to her because my sister is a dancer and a performer and that’s all my lady wants to do and be,” he adds. “Auntie Kiki is what she calls her, and it’s all about Auntie Kiki. There is literally no recommendation we could [give] her. She’s ready.”

Kate Hudson

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Kate is one of 3 children, with dual brothers: Oliver and their half-brother Wyatt Russell. And a latter is only as over a moon for a mom-to-be as Oliver is.

“I was happy. we was teary-eyed since we know how badly she wanted a girl,” he told PEOPLE in April. “I know Danny, I’m certain in some partial of each man’s mind you’re like, ‘I’d adore to have a small me.’ ”

Added Russell, 31, “But when he met my brother’s small lady Rio, who’s a cutest thing in a whole world, she done him be like, ‘Okay, we wish a girl.’ So they’re unequivocally excited.”