Four generations of the Royal family featured on new stamps

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Photo courtesy of Ronald Mackechie/Royal Mail

The Royal family has released its new commemorative stamp in honor of Queen Elizabeth's 90th birthday. 

The best part about the stamp? Prince George is in it! He joined the photo with his father, grandfather and great-grandmother. It's the first time the young price has appeared on Royal Mail stamps.

In the photo, the adults are seated and Prince George is standing on top of a box beside his dad, Prince William. 

The group photo has been issued as a sheet that divides into four stamps, one for each of the royals. 

Queen Elizabeth's birthday is Thursday, April 21.