Those who grew up watching Disney's Lizzie McGuire, know it made Hilary Duff into a teen idol. Since then, the actress has grown up to become a Hollywood star, with multiple albums and numerous television and movie roles.

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Fans of the "So Yesterday" singer already know so much about her, but what about her relationship with her other half, Matthew Koma? Those who aren't into the EDM scene, may not know Duff's husband, but this DJ has worked with the likes of Zedd and toured Europe with Ellie Goulding and Charli XCX. So, how exactly did these two meet and become parents of two children? Let's take a look at 10 little-known facts about Hilary Duff's relationship with Mattew Koma.

10 They Are Both Musically Inclined

Since her debut to the music scene in 2002, Hilary Duff has sold an estimated 15 million records. She's released five studio albums throughout her career and has seen her albums go platinum and gold.

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Matthew Koma began his music career in the punk rock genre, later transitioning to pop, hip-hop and EDM. He has mainly worked behind the scenes and has been a producer for many years. His most notable work includes collaborations with Zedd, Alesso, Steve Aoki, and Hardwell.

9 His Past Girlfriends Include Carly Rae Jepsen

Fans may not know of Matthew Koma's past relationships, but it included another pop artist before marrying Hilary Duff. Koma dated singer Carly Rae Jepsen, who is most known for her hit "Call Me Maybe," in 2012. The pair met when Jepsen was working on her single "The Kiss," but the relationship ended a year later.

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Koma has also been linked to actress Emily Kinney, who starred in AMC's The Walking Dead, but it's unsure for how long the two were dating.

8 Hilary And Matthew Met When Working On Her Album, Breathe In. Breathe Out.

Surprisingly, Duff knew of Matthew Koma long before the couple began to get serious. With the two being successful music artists, the pair met back in 2015, where Koma helped to write and produce songs for Duff's fifth studio album, Breath In. Breath Out. 

Koma helped to write the songs, "Arms Around a Memory" and "Confetti" for the album.

7 She Made The Relationship Official On Instagram While On A Romantic Vacay To Costa Rica

Fans got a chance to see the new couple's relationship blossom on Hilary Duff's Instagram when she shared a sweet shot of the two vacationing in Costa Rica. The singer posted a photo back in 2017 of the two cuddling and Koma planting a kiss on her cheek, with the caption, "Take me back to Costa with him."

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Hilary officially split from ex-boyfriend Jason Walsh in December 2016 and quickly found love again with Matthew Koma.

6 They Had An On-Again Off-Again Relationship

Hilary Duff and Matthew Koma began dating in 2017, but the pair had an on-again, off-again relationship before they welcomed their daughter in 2018, Banks Violet Bair (Bair is Koma's real last name.)

In March 2017, the couple briefly split, but they rekindled their romance in October of the same year after they began posting Instagram photos together. Soon after, in June 2018, Duff revealed she was expecting her second child, and Koma's first on her social media.

5 They Welcomed Their Daughter Before Getting Engaged

Hilary Duff and Matthew Koma welcomed their daughter, Banks Violet Bair in October 2018, posting a photo on her Instagram of Koma and Duff snuggling their newborn daughter, and captioning the photo, "This little bit has fully stolen our hearts!"

The next year, Koma proposed to the singer in New York City. Hilary posted a sweet photo of the pair on her social media account showing off her beautiful diamond ring, with the caption, "He asked me to be his wife."

4 Matthew Is A Stepdad To Hilary's First Son, Luca

Besides being a songwriter, producer, and DJ, Matthew Koma is also busy being a father of two. Hilary Duff has a son with ex-husband Mike Comrie, a retired NHL player, named Luca Cruz, who is now eight years old.

Koma posted numerous photos hanging out with Luca and the rest of the family and showing fans that he's been a terrific step-dad to Duff's son.

3 Hilary And Matthew Adopted A Dog Together

The Bair family added an extra member to their household when they shared with their fans that they adopted a senior dog named Lucy in March 2018.

The couple went to Los Angeles-based shelter Love Leo Rescue, where they fell in love with Lucy and took her home. The new addition came a month after Duff lost her 10-year-old dog, Dubie.

2 The Pair Got Married Eight Months After Getting Engaged

After getting engaged, the couple did not wait long to get hitched and got married in a private ceremony among close family and friends in the backyard of their Los Angeles home in December 2019.

The pair looked stunning, especially Duff, who wore a custom-made wedding gown by Jenny Packham.

1 They Are Totally In Love

This young couple continues to share their most intimate moments with their fans, from their simple and cute engagement to their low-key wedding and time spend with their children, Hilary and Matthew are one of Hollywood's sweetest married couples.

Fans can't wait to see what else these two have up their sleeves for the future.

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