The younger Hanks wrote the message to his “Pops” on Instagram – but instead of using a photo of his actual father, he posted a photo of Keaton, known for films such as “Spotlight” and “Beetlejuice.”
“Wanna wish a Happy 63rd Birthday to my dad!!!” the younger Hanks wrote. “He's a good man with a great sense of humor. Love ya Pops!”
The 41-year-old has developed a penchant for using photos of Keaton when referring to his two-time Oscar-winning father and star of ‘80s comedies “Splash” and “Money Pit.”
In 2016, he wished his dad a happy father’s day with an image of Keaton in the 1982 movie “Night Shift.”
Colin Hanks has yet to let fans in on the joke with his dad. The elder Hanks and Keaton voiced characters together in “Toy Story 3” in 2010 and each gained fame for starring in a slew of comedy films throughout the 1980s.
Keaton won’t celebrate his real birthday until Sept. 5 when he’ll turn 68.