Paris Hilton is a proud mom.

On Monday, the 42-year-old heiress — who dressed as Princess Peach for Halloween — shared a TikTok of her nine-month-old son Phoenix Reum dressed as Sesame Street character Cookie Monster.

The blonde beauty wrote in the caption, ‘Cuteness overload. Love him so much! My heart is so full!’

The post has so far collected more than 13,000 likes from the star’s 8.8 million followers on the app.

In the clip, Hilton can be heard gushing, ‘Are you cute?’ and explaining to the tot, who’s looking curiously at his image, ‘That’s you!’

Proud mom: Paris Hilton shared a TikTok of her nine-month-old son Phoenix Reum dressed as Sesame Street character Cookie Monster

Gushing: The blonde beauty wrote in the caption, ‘Cuteness overload. Love him so much! My heart is so full!’

Paris and her husband of two years, Carter Reum, welcomed the little boy this past January via surrogate.

The adorable video post comes after her younger sister Nicky Hilton spoke out against online trolls who have bullied her nephew over the size of his head.

While attending the Glamour Magazine Women of the Year event on Tuesday night, the socialite, 40, condemned cruel questions and online speculation about the perfectly healthy baby boy’s appearance.

‘I think that if you are bullying an infant then you have serious issues and you really take a look at yourself,’ the fashion designer told Page Six.

The mother-of-three continued: ‘It’s so demented.’

Paris had previously clapped back at critics who made vile comments about her only child.

‘There are some sick people in this world. My angel is perfectly healthy,’ Paris wrote on TikTok. ‘And yes, of course he has been to a doctor, he just has a large brain.’

And last month, the reality television personality shared a statement on X defending Phoenix and telling haters that ‘targeting’ him was ‘unacceptable.’

Bundle of joy: Paris and her husband of two years, Carter Reum, welcomed the little boy this past January via surrogate

In the text, Hilton also defended sharing photos of her son, noting that people would assume she is ‘not a great mother’ if she doesn’t occasionally share images of Phoenix.

‘Living life in the spotlight, comments are inevitable, but targeting my child, or anyone else’s for that matter, is unacceptable,’ Paris began her note.

‘This hurts my heart more deeply than words can describe,’ she continued, adding a broken-hearted emoji.

She added that she has tried to foster ‘love, respect, and acceptance’ in the hope that it would be reciprocated.