Zac Efron made a much-anticipated appearance on “Dancing With the Stars” this week to cheer on his brother, Dylan Efron, during the semifinals.

The 38-year-old “High School Musical” actor was seen prominently seated at the event on Tuesday, with his little sister, Olivia, who is five years old, sitting comfortably on his lap.

In a charming pink dress with puffed sleeves, Olivia enjoyed the live show, while Zac opted for a laid-back look, donning a dark button-down shirt layered over a white T-shirt.

Despite Dylan, 33, and his dance partner, Daniella Karagach, reaching their tenth week in the competition, fans have been puzzled as to why the star of “Iron Claw” took so long to make an appearance—especially since even Prince William managed to show up before him.

Viewers took to social media in droves, humorously pleading for Zac to attend the show, creating a buzz with their playful posts.

The “Traitors” alum, however, wasn’t too concerned with the delay.

“Hey, he’s doing his thing,” Dylan told Extra in October with a laugh, adding that Zac has been “supporting [him] every day.”

Fans expected to see the “17 Again” actor when Olivia led out Dylan’s Dedication Night performance of “Rewrite the Stars” — from Zac’s movie “The Greatest Showman” — with Karagach last month.

Dylan dedicated the performance to Olivia, with an emotional nod to Zac.

“I’m dedicating this dance to my little sister, Olivia,” Dylan said in a pre-taped video ahead of the emotional performance, adding, “I wasn’t expecting to be a big brother…but immediately, I was inseparable from her.”

“Now, being able to dance to ‘Rewrite the Stars,’ this is a nod to my brother,” he explained, while getting emotional.

“Zac’s always taken care of me and he did things that were so selfless. I wanna be that to Olivia, I wanna be the best role model I can.”

Fans were thrilled to finally see the former teen heartthrob in the audience supporting Dylan, who is famously close to his older brother.

“THE WAY MY HEART SKYROCKETED WHEN ZAC EFRON CAME ONTO THE SCREEN,” a fan on X gushed, while another wrote, “I’m cracking up y’all bullied Zac Efron to the ballroom.”

“When I tell you I screamed when Zac Efron popped up on my screen. Him being there along with his and Dylan’s sister Olivia got me shedding a tear,” a third chimed in.

“Zac Efron and Julianne Hough in the same room — DIRTY GRANDPA REUNION,” quipped a third, referring to the 2016 comedy the duo appeared in.

A photo circulating on X showed Hough — who is now co-hosting Season 34 with Alfonso Ribeiro — posing with Zac and Olivia as they sat in the audience.

Dylan and Zac — whose parents Starla Baskett and David Efron divorced in 2016 — are now big brothers to Olivia and Henry, 4, whom David has since welcomed with his second wife.