During the season premiere of The Masked Singer Australia on Monday night, the Echidna was the first to be unmasked.
It was revealed that the man behind the mask was tennis star Mark Philippoussis with Jackie 'O' Henderson the only judge to guess correctly.
Dannii Minogue was close, guessing fellow tennis star Bernard Tomic with Jackie O saying: "I agree that it's a tennis player, and he's got a brilliant serve, he's done modelling. I am locking in Mark Philippoussis."
After being unmasked, Mark admitted he was disappointed to be out of the competition so early, given his competitive nature.
"I was bummed. I'm going to be honest, I am competitive," he told host Osher Günsberg.
However, he added that he loves music and singing so still enjoyed the little time he had.
"I mean...who doesn't love to sing? I love music. It was an incredible adventure and it was, you know, good to do something where you're uncomfortable," he said.
"I definitely was uncomfortable in this mask, but it was an absolute pleasure and it was fun."
Fans took to Twitter to celebrate that they too had guessed correctly.
One user wrote: "Before Echidna started singing my mum said 'that’s Mark Philippoussis.' I just asked how on earth she knew and her response was 'something about his legs.'"
Another wrote: "Absolutely Echidna is Mark Philippoussis. No doubt."
Many fans used the clues to also correctly guess Mark as the Echidna.
The clues in the Echidna video were:
"I only know one way to go... pedal to the metal from start to finish."
In one video, we saw him playing a set of five records on a set of DJ decks while he was rocking a crib.
In another set of clues, numbers appeared on the records, smashed surf boards appeared, he also walked down a catwalk and revealed that he had previously worn his heart on his sleeve leaving many to guess Mark.
One user said: "Mark Philippoussis is Echidna. Was on a dating show and his surfboard snapped in rough surf."
"Echidna is Mark Philippoussis His record serve was 229km/h and was on a show looking for love called Age of Love. Nailed it," another added.
Some were stunned to see Mark on TV, with one person tweeting "They said this season has big names.... So how can Echinda be Mark Philippousiss?"