Brooke Shieldsis remembering the time a silly prank she pulled onThe Tonight Showsuddenly became very real.

Carson, the entire camera crew, and the audience werent in on the joke.

So my mom said, Lets do that for Johnny, and lets do it as a surprise.

THE TONIGHT SHOW STARRING JIMMY FALLON, Pictured: Actress Brooke Shields during an interview on Friday, May 10, 2024

Brooke Shields on ‘The Tonight Show’.Todd Owyoung/NBC via Getty

Todd Owyoung/NBC via Getty

The mother-daughter duo didnt tell any of the camera operators or Carson about their prank.

They did, however, let one of her funny fellow guest stars that evening in on the secret.

And Im like, Hey Tommy, Ive got a surprise for you.

Im doing something on the show, Shields said.

And now they feel terrible for me, she said.

They think this is real.

Carson adds, I said, Thats one of the funniest entrances Ive ever seen.

When the clip ended, Shields revealed how Smothers was instrumental in helping her save face during her interview.

Thank God Tommy, on air, said, Was that the surprise?

He totally supported me so that they actually believed it was planned.

Watch Shields recall falling for Johnny in the clip above.