Bruno Mars 'sued by photographer for posting a 1989 childhood snapshot of himself

Singer, Bruno Mars is reportedly facing legal action for posting a black and white childhood picture of himself posing as a pint-sized Elvis Presley impersonator on his social media accounts.

According to TMZ, the 32-year-old singer is reportedly being sued by photographer Catherine McGann who snapped the 1989 image and says she still owns the copyright.

The photographer claims he posted it on all his social media accounts (Instagram, Twitter, and Facebook) in June as part of the 'Way Back Wednesday' craze and didn't seek permission.

Read TMZ report below..

Catherine McGann says she snapped this 1989 shot of Bruno -- when he would've been just 3 or 4 years old, but was already famously performing the King's hits. McGann says she owns the copyright on the shot ... so, she was shocked to see it pop up all over Bruno's social media.

In the docs, obtained by TMZ, she says he posted it back in June on his IG, FB and Twitter pages ... for a "Way Back Wednesday" that blew up. McGann says it garnered more than 1.2 million likes on Instagram alone. In other words ... 24k magic!

Now, it doesn't take a suspicious mind to figure out the alleged problem here -- McGann says Bruno never got permission to use her copyrighted work. She's suing Bruno and his record label, Warner Music, for damages and all profits they earned from her photo.