My nephew was born on October 30th 2015 and ever since his birth i have been planning to be Allen and Baby Carlos from The Hangover 3 for halloween! He just fits the bill looking exactly like Carlos! I only purchased the beard and hair for this costume. Everything else was DIY. I had similar clothes to what Allen wore in the film, we used my sisters strap on to hold my nephew in place, and his onesie and hat we found at target which will definitely be used even after the costume. I think we looked just like the characters in the actual film!
Allen and Baby Carlos costume from The Hangover 3 submitted by Din S.