TikTok star Addison Rae started posting on the video-sharing social media platform in the summer of 2019 and by the end of the year, she was one of the biggest stars on the app. In 2020, Addison started hanging out with the Kardashians which certainly only helped her become even more famous.

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Today, we're taking a look at just what her relationship with the famous family is. From how Addison Rae became best friends with Kourtney Kardashian to just which Kardashians she has worked with so far — keep on scrolling to find out!

10 Addison Rae And Kourtney Kardashian Met Because Of Mason Disick

TikTok star Addison Rae entered the inner circle of the Kardashian family thanks to Kourtney Kardashian's son Mason. Mason and Addison got introduced to each other by YouTuber David Dobrik back in the spring of 2020 when Mason still had a profile on the video-sharing platform (he deleted his profile since). At the time, Mason was a huge fan of Addison so she was invited to hang out quite a lot.

9 The Two Ladies Hung Out A Lot During Lockdown

Soon after meeting, Kourtney Kardashian and Addison Rae started hanging out a lot and they certainly weren't shy about it. It all happened during a global pandemic when people were urged to social distance — but the two just couldn't spend time apart. Whether it was hanging out by the pool or recording TikToks together, Kourtney and Addison quickly became the hottest new BFFs in the world of the rich and famous!

8 So Much That Kourtney's Sisters Thought They Were Dating

The two ladies spent so much time together that even Kourtney's family thought it was weird. At one point, Kim and Khloe even believed that Kourtney and Addison are hooking up — so they asked the young TikTok star about her relationship with their sister.

Related: Kourtney Kardashian Fans Think Addison Rae Is 'Copying Her' With New Rocker Boyfriend

As those who have seen the scene played out on Keeping Up With The Kardashians already know, Addison denied that the two were anything but friends.

7 Addison Appeared On 'Keeping Up With The Kardashians'

As previously mentioned, Kourtney's BFF even appeared on her family's reality television show Keeping Up With the Kardashians. Judging from the footage, it definitely seems as if Addison is super comfortable around the Kardashian family — even on screen. No one would be surprised if we got to see more of Addison on the Kardashians' upcoming Hulu show.

6 And Kourtney Appeared In 'He's All That'

This summer Addison Rae had her acting debut in Netflix's rom-com He's All That and while the TikTok star played the lead Padgett Sawyer — her BFF Kourtney also made a cameo. In it, Kourtney portrayed Jessica Miles Torres and she was definitely perfect for the role. Who knows, maybe fans will see the two share the screen in the future again!

5 Addison Doesn't Seem To Be BFFs With Kourtney's Sisters

Those who have seen the episode of Keeping Up With the Kardashians that Addison Rae appeared in will certainly agree that while Addison seems to be on friendly terms with Kourtney's whole family — she isn't too close with them. However, with time this might change, especially with Addison attending all of the annual Kardashian parties!

4 But She Was Friendly With Scott Disick

While Addison never seemed to close with the rest of the Kardashians, Kourtney's BFF did hang out with Scott Disick on multiple occasions.

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It certainly seems as if Kourtney wasn't bugged by that and the two ladies even made fun of the rumors that Addison was dating Kourtney's ex.

3 Addison Appeared In SKIMS' One-Year Anniversary Campaign

Addison may not be as close with the rest of the famous family as she is with Kourtney — but that doesn't mean that she isn't doing business with them. Last year the TikTok star was the face of Kim Kardashians' shapewear company Skims for its one-year anniversary and she was definitely the perfect fit for it!

2 Addison And Kourtney Are BFFs Despite Of Their 21-Year Age Gap

Many immediately wondered how Kourtney and Addison managed to become such close friends — considering that Kourtney is 42 while Addison will turn 21 this October. However, Kortney revealed that the two are close despite their 21-year-age gap as their "energies align" and that Addison has a "young heart and an old soul."

1 Lastly, It Seems As If Addison Will Remain In The Kardashians' Inner Circle

Kourtney and Addison became close in early 2020 — and today they're still spending just as much time together, at least judging from their social media platforms. While some may have thought that Addison wouldn't stay close to Kourtney for too long — the two seem to have truly bonded and judging from everything we know about them so far it's safe to say that Addison will remain a member of Kourtney's (and the Kardashians') inner circle!

Next: Does Kourtney Kardashian Still Talk To Scott Disick & Her Other Exes?