Daniel Mickelson, an up-and-coming actor who starred in several TV series and movies, has passed away at the age of 23 during the Fourth of July weekend.

On Monday, his death was announced by his sister Meredith, describing how her heart is "shattered" by the tragedy.

"Yesterday, I lost my brother, best friend and the other half of my heart."

"There wasn't a person I loved more on this earth. There's no words that can do him justice that I could write."

Meredith described her brother as someone who had "the happiest brightest smiley most sunshine human to exist."

She concluded, "I'm so happy God chose me to be his sister for his whole amazing life."

A cause of death for Daniel Mickelson is yet to be revealed.

Daniel Mickelson Hollywood Career

Daniel Mickelson starred in "Mani" and the indie horror movie "The Killer Clown Meets The Candy Man."  

He became known for posting to Twitter, Instagram, and Snapchat.

Daniel was also previously associated with Brooklyn Beckham's fiancé Nicola Peltz and model Lexi Downie.

READ MORE: Kim Kardashian vs. Kanye West: Who Is Likely To Become The Next Best 'Kris Jenner'?