AceShowbiz - On his podcast, "Podcrushed", Penn Badgley revealed that the greatest prank ever played on him came from the mischievous Blake Lively. She cleverly managed to convince him that Aerosmith's lead singer, Steven Tyler, was his biological father.

Badgley received an email claiming that someone believed Tyler thought he was his son, but he initially dismissed it as a joke. However, things escalated when his publicist confirmed that the story wasn't going away. His manager and publicist later informed him that Tyler was adamant about his alleged paternity.

Despite his disbelief, Badgley was shocked when his mother answered his call in an upset manner. After a pregnant pause, she asked, "Why do you think we moved out of Maryland?" For a brief moment, Badgley was left speechless, contemplating the revelation that his entire life had been a lie.

It wasn't until Badgley realized it was April Fools' Day that the truth dawned on him. Lively's prank was so well-executed that she even enlisted his team of representatives to keep the ruse going.

Lively is known for her love of pranks, and she had a distinct advantage in pulling this one off because of Badgley's trusting nature. He admitted that he never suspected anyone would try to prank him.

Badgley and Lively spent six seasons on "Gossip Girl" as love interests Dan Humphrey and Serena van der Woodsen. They dated in real life from 2007 to 2010 and remain amicable exes.