I just caught an ep of 'Still Standing' where they introduce a new character: Chris from next door.
It took me all of ten seconds to recognise the vocal and physical attributes (the mop-top helped as well!) And there he was, Mac in his late teens! (Right down to the 'long-sleeves under the t-shirt' attire and 'way smarter than his peers' characteristics)
I of course had many a *squee!* moment whenever I heard some 'Mac' in there!
Also, once '13 going on 30' was on tv, running in the background but I wasn't actually watching it. My ears perked as I recognised a very familiar voice in there and there he was!
I just love finding surprises like that in everyday entertainment and I'm sure (according to iMDB at least) that we're going to see and hear a lot more of Sean in the not too distant future...so who's spotted him?