Belli was a featured article for May!

Belli (B/illy & K/elli) is the romantic/friendship pairing of Kelli Berglund and William Brent

For the in-show pairing of Chase and Bree, see Brase.

Other Names

  • Killy (K/elli & B/illy)
  • Kelly (Ke/lli & Bi/lly)
  • Billi (Bi/lly & Ke/lli)
  • Keilly (Ke/lli & B/illy)


Kelli and William are really close friends. These two appear to be close friends who commonly communicate with each other. They like to tease each other playfully, but they get along really well. The two have also done a Disney XD Xtra together as shown here. Kelli and William are good friends on and off of the show, and they tend to tweet each other from time to time. In interviews together, they tend to stand really close to each other, both not really noticing it. In most cast pictures (the ones that the actors post themselves), they are shown to almost always be next to each other in any way.


  • Kelli has posted a picture of her and William together on instagram and captioned it: Throwback with the best.
  • William tweeted Kelli saying "YO! @kelliberglund"
  • They did a Disney XD Xtra together.
  • William posted a picture of Kelli and him together wearing their Lab Rats mission suits as shown here and captioned it: #FlashbackFriday with this lovely lady.
  • When Kelli posted a picture of herself, he commented: Omg you're so pretty.. I'm a big fan! Hahah.
  • Awhile back, on instagram, Kelli posted a picture of a rose . Just recently, William reposted the picture and captioned it: Remember yesterday walking hand in hand Love letters in the sands I remember you And through the sleepless nights, through every endless day I wanna hear you say, "I remember you."
  • Kelli knew that William was obsessed with spiderman (as shown in this interview ) meaning that she knows a lot about him.
  • Kelli called William the "Best Spiderman Out There." (In this interview .)
  • The pair were also in a fake trailer for a fake movie called: The Day Before Yesterday .
  • William and Kelli went to Radio Disney's NBT (Next Big Thing) together.
  • They went to Disneyland together (and with others) for his birthday.
  • Kelli posted a picture of her and William together and captioned it: I missed my best friend, meaning her and Billy are really close.
  • William and Kelli went to Disney Valentines Day Party together.
  • When William posted a picture of himself on instagram , Kelli commented "Handsome." On it. 
  • Kelli went on William's twitter, tweeted : dont leave your phone UNATTENDED #kelliberglund #thegreatest #hi and posted a picture of herself with the tweet.
  • William posted a picture of him and Kelli at a Aerosmith concert on instagram. He captioned it with this:Throwback to the "Aerosmith" concert w/ @kelliberglund. I can honestly say that I've never met someone so special and lovely. Such a wonderful person.. And my best friend. Can't begin to explain how blessed I feel to be able to work with the her and the rest of the Lab Rats cast. #KeepFriendsClose #LabRats #Aerosmith
  • Kelli tweeted: Don't forget to tune in to the new #LabRats episode tonight with @joeylogano at 9pm! and William retweeted.
  • William tweeted : Good day today? @kelliberglund (:
    • She tweeted back: Well thank you very much for asking. But I think you can answer that for yourself. All I have to say is: FLYING SAUCER!
      • William responded to her tweet with, HAHAHA FLYING SUACER!!!
    • Kelli retweeted his tweet**SAUCER**
      • Kelli replied to his tweet and said, funny stuff. Oh, and it's spelled s-a-u-c-e-r cutie patootie
        • ​William tweeted her back saying, @kelliberglund I know how it's spelled!! Haha I have fast fingers! Lol
  • Kelli tweeted about the new episode of Lab Rats, and linked a pic of her and William with it.
  • She was with William on his 18th birthday.
  • In an instagram post , she greeted him a happy birthday, called him handsome and said that the amount of ❤ she has for him is unreal.
  • In the "Know Your Castmates " for Lab Rats, William guessed the correct answer for "What is Kelli's favorite color?" Spencer and Tyrel both guessed pink, but Billy predicted green.
  • Kelli captioned an instagram post : MATCHING PANTS YO and in the picture, was Tyrel, William and Kelli, with Billy and Kelli wearing matching pants.
  • William posted a pic on Instagram of him and Kelli. He captioned it: Nikki & the hippie! We can't help that we're sexy!! @kelliberglund @ashleyamandacrowns #Fishnets #HatersGonnaHate #TrickOrTreatMofo 😝.
  • William posted on instagram a pic of Kelli and captioned it: Saddle Ranch last night w/ @kelliberglund @ericunger before Insidious 2. #GoodTimes #KelliHackedMyPhone ... #Again ... Haha.
    • William  also tweeted it.
    • Kelli retweeted Billy's tweet.
  • William posted another pic of Kelli and captioned it, Haha I should really change my password.. I set my phone down for 2 sec and this is what happens. 😄 She loves doing this.. Gotta admit.. She's pretty adorable. �
  • On Kelli's 18th birthday, William tweeted her, Happy birthday to the incredibly sweet, talented, beautiful, lovely & NOW 18 yr old @kelliberglund! Love you Burgles.. Have an amazing day!😉
    • Kelli retweeted his tweet.
    • She replied to the tweet saying: @BillyUnger BILLLLY! Thank you very much. ❤️ Love you so much 😁💙
  • William posted a picture of him and Kelli, captioning it: #TB #Coachella weekend 2 w/ ma little kellbell...
    • ​He also tweeted the picture.
    • Kelli re-tweeted his tweet of them.
  • In the Know Your Castmates: Lab Rats special,  when the cast were asked, "What is Kelli's favorite food?" William was the only one who got it right (steak).
    • In addition to his answer, he mentioned that he had the same favorite food and that it was a thing he and Kelli had in common: they "both love steak."
  • William tweeted  49er's vs. Seahawks 👌 Kelli responded to his tweet with, niners 👊
    • William replied to her tweet and said, Seahawks 👊🎉💣🏈
    • Kelli tweeted him back with an annoyed emoji.
  • Kelli tweeted a picture of a sleeping kitten and said, According to @billyunger, this is me in animal form 🐱🐱🐱🐱🐱🐱🐱🐱
  • William tweeted, @Slash happens to be in Toronto for the next couple of days.. @kelliberglund better tell me if she runs into him on the street!!
    • Kelli responded with, @BillyUnger @Slash NO WAY, it's funny you say that..him and I just got together for lunchhh
  • Kelli tweetedYou guys should reallyy check out my friend @BillyUnger's band "Fair Warning" at the OC Fair July 25th at 12:30 on the Hangar Stage! 😃
  • William tweetedAren't haters entertaining...? Haha and Kelli responded with, "Don't let the haters stop you from doin your thang"...Wise words from Kevin G
  • Kelli wished William a Happy Birthday twice on his 19th Birthday.
  • In a interview , when William said: 'We aren't that special', the interviewer said: 'Yes, you are' and then William said: 'She is', pointing at Kelli.
  • Kelli would go to William if she would need advice for her first date, William would probably bring Kelli with him shopping and Kelli would take William with her if she would get attacked by something like robbers.[1]


  • They both did a "My Life" segment on Disney XD.
  • They both have a younger siblings. (Eric Unger and Kirra Berglund.)
  • They both have done a TRYit! segment. In addition, both have done it with someone from the Kickin' It cast.
  • They both have a sister. (Erin Unger and Kirra Berglund).
  • They both have done a clevverTV interview.
  • They both have done several interviews together.
  • They're close friends.
  • They both follow each other on Twitter and Instagram.
  • They tweet each other from time to time.
  • They're also close with the rest of their cast mates.
  • They're supportive of each other.
  • Both of them have dyed their hair blonde.
  • They both guest starred in Disney XD's Kickin' It.
  • They were both pranked by Crash on Pranksgiving.
  • They both have guest-starred as a celebrity in a Disney show (Billy in A.N.T Farm and Kelli in Kickin' It).
  • They're both good friends with Leo Howard and Olivia Holt.
  • They went to D23 Expo 2015 and did an interview together.
  • Though Kelli plays his older sister in the show, Billy is actually older than her.


The image gallery for Belli may be viewed here.


Code: Belli

This user ships Belli!