welcome to the family. >> a.j.'s family tree has over 77 million leads and continues to grow. >> here i am and then just 23 relatives away there's george stephanopoulos, people say that they don't feel alone anymore. they feel connected. >> i'm daniel radcliffe and a.j. jacobs and he's my cousin and we are probably cousins. >> reporter: even though his own family claims two american presidents, not everybody is impressed. >> tory, it's your cousin a.j., we're just 17 steps away. it's your cousin through the donskis. relatives maybe no one will notice she's notreunioning a,bcs >>> what's your favorite place in america? the place that makes you the happiest. this summer that's what "gma" wants to know. maybe it's where you had your first kiss or walked as a child with your dad. go now to goodmorningamerica.com on yahoo! and tell us about your favorite place in america and, who knows, we might just drop in and visit you there. >>> incredibly multitalented neil patrick harris is here, so excited about that. >> thanks. >