ThatMartinKid, 26

What’s the Back Story?

So… in the Fall of 2022, ThatMartinKid decided to start content creation. He posted his first TikTok in October 2022 titled “life of a micro-influencer,” and right there, his journey as a creator took off.

Cue into this: Martin’s oldest Instagram post was a Halloween picture of him, posted on November 1st 2020. Now, all this was before him and Hamzah became a content duo.

Fact-check: Martin and Hamzah launched the Slushy Noobz collaborative content group in May 2023, that’s a little over two years after he became a creator.

Get this, though: Martin and Hamzah have been friends since they were literal kids, and yeah, they are childhood best friends… those kinds of friends that lowkey starts feeling like a sibling, as you grow up. Yeah, that’s what Hamzah is to Martin, vice versa.

Now, his girlfriend, Mandy, came into the picture in the Summer of 2022. Well… his oldest picture with her was from an Instagram post from their trip to Europe in May 2022.

Got it? Well, then, let’s get into everything else we found out about him, including details about his early life, family background, ethnicity, relationship timeline, and really, everything there’s to know about him. Wait… take a look at his quick profile rundown as we get into it.

Profile Rundown

Early Life

ThatMartinKid was born on March 25, 1999, in Edmonton, Canada, to parents of Croatian descent. His zodiac sign is Aries. His real name is Martin Andrijasevic and his last name, Andrijasevic, is a surname mostly used by people of Serbo-Croatian descent.

Martin is currently 26 years old, and yes… he is Gen Z. He has a younger brother named Tomas. Although he is originally from Edmonton, Canada, he has lived in other parts of Canada, including St. Albert, Alberta, and Ottawa, Ontario.

Relationship Timeline

Martin and his long-time girlfriend, Mandy’s Iphone, have been together since 2022. Their first ever post together was Instagram posts of them, following their trip to Europe in May 2022. Both Martin and Mandy each made posts about the trip, however, they didn’t confirm they were a couple… in plain words.

But, anyway, on July 29, 2022, Mandy posted a series of pictures of herself, Martin, and her dog, Rudy, with the caption: “I love my dog and boyfriend.” Given all this, it’s likely they began dating way before they made the relationship open in May 2022.

Now, in September 2023, Martin and Mandy moved to Toronto and have been living together as a couple since then. They announced their engagement proposal in August 2025 and are looking forward to getting married. Via his Instagram page, Martin captioned the proposal announcement:

“engaged! finally my moms gonna be so happy cause she been asking when i’m going to get married so now im one step closer.”

Body Measurements

ThatMartinKid stands 5 feet 8 inches tall (173 cm), and weighs 60 kg (132 lbs). He has Croatian ethnic background; has dark brown eye color, dark ginger hair, and white skin color.

He and his fiancée, Mandy, have eight pets together, including Mandy’s Chihuahua dog named Rudy, their two Cornish Rex cats, Carl and Fish, two rats, Smudge and Sora, one hamster, Taro, and one fish named Cat.

Career Timeline

ThatMartinKid has been managed and represented by Peter & Fish talent agency; the same talent agency that manages Mandy. Cue into this: the business email address on his Instagram bio, ashley@peterandfish.com, is hosted by peterandfish.com, so yeah.

Martin previously worked as a programmer for the Canadian government. In June 2024, however, he left his job to work on Slushy Noobz full-time. He and Hamzah launched the Slushy Noobz brand back in May 2023 and currently, he works full-time in that collaborative, but he also runs his personal brand (@thatmartinkid) across every social media platform.

He co-hosts the podcast and YouTube show, “Out of Character with Hamzah.” Individually, he has a huge fan base across TikTok, @thatmartinkid with over 2 million followers, Instagram @thatmartinkid with 700k thousand followers, and YouTube with 45k subscribers… although he has only posted 3 videos.

The Slushy Noobz YouTube collective he runs with Hamzah has over 1 million subscribers, and 145 million all-time views. Martin also makes music under the name 2006WR, and yes, his soon-to-be often feature in the Slushy Noobz YouTube channel with him and Hamzah.

Given all this metric, his fan base, social media content reach, ThatMartinKid’s net worth and overall earnings is estimated to be on the high side.

Citation/Sources:

Wikipedia article confirming Andrijasevic surname to be a last name commonly found among people of Serbo-Croatian descent: Article here.