Donald Trump Jr. has warned boys to "stay away" from his daughter Kai Trump after the 17-year-old went viral on social media.

Former President Donald Trump's eldest grandchild made her political debut on stage at the Republican National Convention in Milwaukee Wednesday.

The video of Kai giving a speech at the convention immediately went viral on X, formerly Twitter, garnering thousands of comments praising the teen, whom Donald Jr. shares with his ex-wife, Vanessa.

Kai Madison Trump
Kai Madison Trump speaks on stage at the Republican National Convention on July 17, 2024. CNBC Television/YouTube

After Kai's speech earned her an influx of admirers, the protective dad sent out a warning to the teenage boys crushing on his daughter during a sit-down with Fox News' Laura Ingraham.

"Get away, you little b*****ds, and stay away," Donald Jr. said.

However, Donald Jr. also raised eyebrows with another comment he made about his teen daughter.

In a video he uploaded on TikTok earlier this week, the eldest son of former President Trump referred to Kai as "sexy" as they were preparing for their RNC appearance Wednesday.

Donald Trump Jr. and his daughter Kai Madison Trump
Donald Trump Jr. and his daughter Kai Madison Trump attend Z100's Jingle Ball 2011, presented by Aeropostale Madison Square Garden on December 9, 2011 in New York City. Michael Loccisano/Getty Images

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"Kai, what do you think," Donald Jr. asked his daughter. "[Does] getting makeup make me look sexy like you?"

"I think you look very beautiful," Kai responded.

"Thank you, Kai. I'm glad you think I look very beautiful," her father replied. "I don't do this often, but in HD, you better do it!"

@donaldjtrumpjr

Kai Trump coming up at the RNC - let’s go!

♬ original sound - donaldjtrumpjr

Donald Jr.'s choice of adjective about Kai was quickly questioned by numerous TikTok users.

"I've replayed this about 100 times to try and convince myself I must be mishearing what he said," one person commented.

"Why would you say that[?]" another questioned.

A third commenter wrote: "What is it with the Trump family and their daughters? Creepy doesn't even begin to describe it," referring to Trump's past controversial comments about daughter Ivanka Trump.

Donald Jr. and Kai have not publicly addressed the controversy.

During her speech Wednesday, Kai praised her grandfather and shared some of her fond memories of him.

Donald Trump stands with his wife Melania Trump (center left) and from right: Eric Trump, Ivanka Trump, Donald Trump Jr. and Tiffany Trump
Donald Trump stands with his wife Melania Trump (center left) and from right: Eric Trump, Ivanka Trump, Donald Trump Jr. and Tiffany Trump. In the front row are Kai Trump and Donald Trump III, children of Donald Trump Jr. on April 21, 2016 in New York City. Getty Images/Spencer Platt

"To me, he's just a normal grandpa," Kai said. "He gives us candy and soda when our parents aren't looking. He always wants to know how we're doing in school."

"When I made the high honor roll, he printed it out to show his friends how proud he was of me," she added.

The teen, who recently won the ladies club championship at Trump's golf course in Palm Beach, also talked about how she and her grandfather bonded over their mutual love for golf.

"He calls me during the middle of the school day to ask how my golf game is going and tells me all about his," Kai shared. "But then I have to remind him that I'm in school and I'll have to call him back later."

Cameras at the convention captured Trump smiling and looking on proudly as his granddaughter spoke on stage.

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Donald trump, Donald Trump Jr