The reality star shared a touching note to Instagram a year after her older brother's tragic death.
The 'Dancing With the Stars' pro said it was an "honor" to be part of his pal's nuptials.
The dance floor was packed with the couple's 'Dancing With the Stars' pals!
The 'Dancing With the Stars' pro and his longtime love got married Friday.
Ballas and Jean first met in 2012 and ET has followed them nearly every step along the way to their nuptials.
The duo is spilling the details on Mark's upcoming bachelor party.
The 'Jersey Boys' star also tells ET he's planning his honeymoon with fiancee BC Jean.
The close pals shared a hug after Mark sang during Derek's samba with Marilu Henner.
The former 'DWTS' pro came back on Monday, but not to dance.
Ballas was handpicked by Valli to play him in Jersey Boys, but hadn't actually met the music legend until now.
The 'Dancing With the Stars' pro told ET "this is an amazing time right now in our lives."
The former 'DWTS' pro also dished on what best man Derek Hough has planned for the Bachelor party.
The bride-to-be tells ET she's excited to 'turn up' with her friends and dance family.
The 22-year-old dancer says she's beyond 'excited' to be paired with the former NFL star.
