Alex Gaskarth is 21 now and will 22 on December 14th!Jack is 20 and cannot drink yet! He will turn 21 on June 18th!Rian is 21 too and only 4 days apart from Alex. He will also turn 22, on December 18th!Zack is 21 now and will turn 22 on April 21st of 2010.If you want to know their birth years then her you are!:Alex December 14th, 1987RianDecember 18th, 1987Zack April 21st, 1988JackJune 18th, 1988jack can drink...just not ligally..hahahah poor jack=]