In Hollywood, unexpected friendships always seem to be forming. Sometimes, co-stars end up forming a tight bond. In other cases, celebrities end up expanding their social circles after being in the industry for long periods of time. Well, in the case of Nina Dobrev and Julianne Hough, their close friendship just formed naturally.

As you know, Dobrev is best known for her role in the TV show, “Vampire Diaries”. Meanwhile, Hough is an actress who has starred in films such as “Rock of Ages,” “Dirty Grandpa,” and “Safe Haven.” She is also a dance pro on the hit ABC show, “Dancing with the Stars.”

Both women lead incredibly busy lives. Nonetheless, their friendship remains very strong to this day. Here’s a look at 15 things we learned about Dobrev and Hough’s friendship:

15 The Two Women Met Through Their Hairstylist

While speaking with E! News, Hough explained, “We've known the same person, Riawna Capri, who cuts and colors and does our hair. She's like, 'You guys have to meet.' We've just been like joined—connected at the hip.” Capri is also the co-owner of the Los Angeles based Nine Zero One Salon. Her other clients includes Selena Gomez and Ruby Rose.

14 They Experienced Heartbreak Around The Same Time

Dobrev had broken up with costar, Ian Somerhalder, while Hough ended her relationship with Ryan Seacrest. However, when Cosmopolitan asked her whether it’s nice to be friends with someone who also went through a breakup, Dobrev explained, “That's not what our friendship is about. Unfortunately, that's how it's perceived, but there's more to us. People aren't defined by their relationships. The whole point is being true to yourself and not losing yourself in relationships, whether romances or friendships”

13 The Women Don’t Really Talk About Girlie Stuff And That’s How Nina Likes It

While discussing her friendship with Hough, Dobrev told Cosmopolitan, “It's been cool to find an active buddy – there are lots of girlie girls around. We don't talk about makeup; we talk about life.” And while they don’t really talk about makeup, it must be noted that the two women always look incredible on the red carpet.

12 When Nina Was Feeling Like A Wreck, Julianne Abandoned Her Own Launch Party To Be By Her Bestie’s Side

While doing an interview with the Chicks In The Office podcast, Dobrev never really got into detail about why she was so upset. Instead, she said, “The girl was...her single just came out Transform, she was having a launch party and this whole thing, she performed it for the first time. And I didn't realize that that was that night and I was going through something and I texted her and she literally left her own launch party to come, like, be the shoulder for me to cry on at my house.”

She added, “That's a best friend. That's a true friend.”

Related: Here’s Why Vampire Diaries’ Paul Wesley Has Turned To Directing

11 Julianne Also Rushed To Nina’s Side When Nina Ended Up In The Emergency Room

According to Good Morning America, Dobrev suffered a severe allergic reaction, which landed her in the hospital. During her hospital stay, Hough came by to hang out with her best friend. She also took photos of Dobrev and posted them on Instagram, with the message, “Who would I be at the Emergency Room with on a Sunday night?! Thank god I went to visit this little sheesh!” Fortunately, Dobrev recovered.

10 Nina Once Expressed Complete Approval Of Julianne’s Husband, Brooks Laich

At one point, Dobrev took to Instagram, saying, “As one of her best friends I can safely say that Brooks has from day one always had all of our stamps of approval. A fellow Canadian with a heart of gold, he is the real deal. He's the kind of strong man Julianne needed in her life. He balances her in the best way possible and brings out the best in her. Around Brooks, Julianne became the best version of herself and I've never seen her happier.”

9 Nina Dated Julianne’s Brother, Derek, Briefly

According to reports, the two only dated for about six weeks. Moreover, an insider told E! News, “It was nothing serious. There was no drama.” An insider also told Us Weekly that Derek Hough and Nina Dobrev's relationship "played itself out". Meanwhile, the breakup never affected Dobrev’s friendship with Derek’s sister. A source said, “Julianne understands — there are no hard feelings.”

8 Nina Never Forgets Julianne’s Birthday, Although She Doesn’t Always Seem To Be Around

In a post made by Dobrev on Instagram for Hough’s birthday, she said, “I feel like every year on July 20th for some reason or another I’m not in the same city, state, country or continent as you and that makes me SO sad. I just wanna hug you and shower you with birthday love on this monumental day... because it is the day of your birth and that makes today the biggest celebration EVA!”

Related: 15 Forgotten Facts About Nina Dobrev And Ian Somerhalder’s Relationship

7 Nina Was Once Rumored To Be Joining Her Bestie On “Dancing With The Stars”

Apparently, Hough would be more than happy for her best friend to become one of the celebrity contestants on the show. A source even told Hollywood Life, “Nina has been asked by both Julianne and Derek to join the show. And if she does it next season Derek will be her partner. And Nina is really considering it. If she doesn’t have a job by the fall she will do it.”

6 Nina Was A Bridesmaid At Julianne And Brooks’ Nuptials

Dobrev was more than happy to share brief footage of the wedding on Instagram, with the caption, “I have been trying to contain my excitement, but I'm thrilled that I can finally share a few magical moments from her beyond beautiful (to dream and die for) wedding. I knew that her cheeks would hurt the next day because she was grinning so wide all day. And they did. Juliannes smile never faded, not for a single second.”