WATCH: Pink surprises Sydney theatre group with unexpected visit to their show: 'Beyond words'

Pink gave members of a Sydney community theatre group the surprise of a lifetime when she waltzed through the doors after watching their show.

While in Sydney for her Summer Carnival Tour, the So What singer made an unexpected stop in Chatswood to watch PACA Sydney's performance of In The Heights.

In a video posted to the group's Instagram, Pink was joined by her husband Carey Hart and their two kids Willow and Jameson to surprise the theatre group after the show.

Watch the video above.

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"That was so hard to sit, I was like "I want to dance too!" the singer told the group at Chatswood Concourse, thanking them profusely for the performance.

"You guys are so good," Pink said, ushering her kids into the room to stand with her.

"Thank you, that was amazing. Willow wants to be in theatre so this was very nice," the pop star shared of her eldest daughter who features on her track Cover Me in Sunshine.

In another post from the group, they claimed it was an "indescribable experience" to get a standing ovation from the singer and were "truly beyond words".

"What a way to close our show! Thank you to special guest, @pink for coming and supporting our show! What a night 🎉🎆" the theatre group captioned the video.

"Wow, what an amazing experience for you all. Pink… such a wonderful lady," one person commented under the under.

"That is just so cool!🙌🔥" another couldn't believe.

Pink touched down in Sydney with her family ahead of her Aussie Summer Carnival Tour.

The Try singer had her opening night in Sydney on Friday at Allianz Stadium, which ended up being quite eventful as a fan appeared to go into labour mid-concert.

During the show, Pink was also joined onstage by her daughter Willow Sage Hart to perform a heartwarming duet of Cover Me In Sunshine.

View gallery

All the times Pink has visited Australia

Ahead of the opening show, Pink opened up about her eldest daughter in an interview with Fitzy & Wippa with Kate Ritchie.

"She [Willow] is nothing like me. She's a rule follower. She's so cool," the singer revealed.

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"She wants to be a trauma surgeon and go to Harvard Medical School. And she brought her report card home and it had straight As. And I looked her I was like, 'What does this feel like?'"

Pink then joked that her younger son, Jameson, is "a runaway train" in comparison.

"He's going to be a DJ in Vegas. I'm setting up the fund for his bail 100 per cent. That guy is loose."