Millie Bobby Brown, Rove McManus, Curtis Stone and other celebrities react to Bindi Irwin's pregnancy news

Bindi Irwin and Chandler Powell's famous friends helped them celebrate their pregnancy news.

Messages of congratulations appeared on their coordinated Instagram announcement from the likes of Stranger Things star Millie Bobby Brown to TV host Rove McManus and celebrity chef Curtis Stone.

"Congratulations! So exciting, so happy for you both," Millie Bobby Brown wrote, followed by three love heart emojis.

"Amazing news!!! Congrats," Curtis Stone, a father-of-two, told the couple.

RELATED: Terri Irwin responds to daughter Bindi Irwin's pregnancy announcement: 'Wish that Steve was here'

"Bindi!!!! I am so so happy for you both," US Dancing With The Stars pro Lindsay Arnold Cusick told the mum-to-be, adding, "Pregnancy has been the most special chapter in our lives so far and I am just so excited to watch your journey! Congratulations."

Bindi won the mirror ball trophy on DWTS in 2015 and fellow pro dancer Sasha Farber also wished the couple well writing, "Omgggggg congratulations you guys!!!!"

Meanwhile, Greg Norman Jr wrote, "Congrats guys!"

TV host Rove McManus, a very good friend of the Irwins, congratulated each member of the family with individual messages.

"You two just keep spreading joy right when we need it," he commented on Bindi's post.

"This will no doubt be the perfect union of two of the most positive, inspiring, decent and caring people on the planet. I can't wait to meet the little one and swap khakis together. Congratulations and all the best for a safe and healthy next few months. Enormous amounts of love from the three of us."

While on Powell's post, McManus said, "Congratulations you two! Truly wonderful wonderful news."

Grandmother-to-be Terri Irwin shared the news on Twitter, to which McManus responded, saying, "SO MUCH JOY! Just what the world needs right now"

And after brother Robert Irwin shared a post on the exciting news, McManus wrote, "Every kid deserves an uncle like you. You are going to enjoy this far too much I reckon. Massive high fives and best wishes to you all!"

Bindi responded to her brother's post, saying, "You're going to be the best uncle!! Baby and I love you!"

Beloved Aussie star Olivia Newton-John sent well wishes to the couple and grandma-to-be, Terri. 

"What wonderful positive happy news! Congratulations Bindi and Chandler-and to grandma Terri!" she wrote. 

Media personality Amanda Keller also sent her love, writing, "Such exciting news. Congrats to you both. So wonderful x." While singer Amy Sheppard commented, "Congratulations. Very exciting news."

American actor Logan Huffman, who is married to The Veronicas singer Lisa Origliasso, is also excited for the couple. 

"What a beautiful family!" he said of the announcement photo. 

Modern Family star Ariel Winter also sent big hugs from across the miles, commenting, "Omg congrats beautiful!!!!!!"

The daughter of Steve Irwin announced her happy baby news five months after she married her boyfriend of six years in an intimate ceremony.

Bindi and Chandler tied the knot in March, just ahead of coronavirus lockdown restrictions limiting weddings to five people.