A lot of people didn’t seem to know who the Baldwins are. They are actors, the most famous one is Alec (top right of the picture below). So I’m guessing Austin means he looks like them cos Alex usually has that handsome yet squinty eyed look.
Also remember the girl from Cody Simpson’s video On My Mind? Hailey Baldwin, her dad is Stephen one of the brothers.
Now that that is all cleared up, you can click on the photo of Austin above to see it in full size.