Today the King of Pop would have celebrated his 54th birthday. Not only are his kids celebrating his day of birth but so is the rest of Hollywood!

Michael Jackson's birthday isn’t the only upcoming anniversary, his “Bad” album celebrates it’s 25th birthday on August 31!

So far no trips or pilgrimages have been reported from his gravesite in Glendale, Calif. but like most national Holidays (and yes, there was a petition to make MJ's bday a national Holiday) the celebs are weighing in on Twitter!

thru my joy & my sorrow , in the promise of another 2morro , i’ll never let u apart for ur always in my heart… happy birthday i love u daddy

— Paris Jacksoη (@ParisJackson) August 29, 2012

MJ left me phone message asking about my disney stuff- RT @huffpostentIt's Michael Jackson's birthday. Tweet your favorite #MJmemory

— John Stamos (@JohnStamos) August 29, 2012

REMEMBERING #MICHAEL JACKSON.THE SOULS OF GREATNESS NEVER DIE. A BLESSING YOU CONTINUE TO BE.WE LOVE YOU! #RESPECT

— MYA(@MISSMYA) August 29, 2012

HAPPY BIRTHDAY to the Greatest Entertainer of All Time! Happy Birthday Michael Jackson! RIP

— Scooter Braun (@scooterbraun) August 29, 2012

Happy Birthday to THE GREAT Michael Jackson! you're missed and your contributions are forever appreciated!

— Nick Cannon (@NickCannon) August 29, 2012

Michael Jackson’s children -- Prince, Paris and Blanket -- are in Gary, Indiana to pay tribute to their late father at "Goin' Back To Indiana: Can Your Feel It." In addition to the kids, Katherine, La Toya and TJ Jackson are expected to attend the festivities tonight which will include a candlelight tribute outside of MJ's childhood home.