: they're from different worlds but share a lot in common. 29-year-old tristan macmanus is consideredm, even though i have asked him to, rip off his shirt or do a stunt. >> reporter: unlike val chmerkovskiy. >> he's a nice guy. tough when he's teaching. but a nice guy. >> reporter: both coupled tonight will dance the quick step. tristan starting dancing at the age of 9. his other passion was football, which we call soccer. >> people never knew i danced. until when i was 16 or 17. i would play football matches in the morning. go straight from there to a dance competition. >> reporter: he's won competitions all over the world. ♪ >> reporter: and so has val. check out this home video his parents gave to "good morning america" of 8-year-old val chmerkovskiy and his teenage brother, maks. yep, that's young maks. ♪ the brothers first learned to dance in their hometown of odessa, ukraine. >> it was tough going to school with dance shoes in one hand and a violin case in the other. >> reporter: playing violin still comes naturally to val. what is your relationship status? >> i walk alone. >> r

our good friend, nancy grace, and her dancing partner, tristan macmanus.e dance floor. let's get something out of the way so we can talk about your dancing. i'm going to use some legal jargon. we heard you say to "access hollywood" you didn't believe it was a wardrobe malfunction. after reviewing the evidence, would you like to recant that testimony? >> no. not at all. that's my story. and i'm sticking to it. now, whatever everybody wants to say, have at it. but no. absolutely not. >> pleading the fifth. >> robin, you'd have to see all of the precautions that "dancing with the stars" takes, so that sort of thing doesn't happen. and i'm just really surprised that a bra accident would make headlines. i really am. >> it made headlines all across the world, it seems. but you were a good sport about it. and it doesn't take away for one moment what you and tristan -- tristan, when you saw len give you guys an eight and say it was a true quick-step, your heart must have gone pitter patter hearing that, tristan? >> it but pretty good, all right. we were looking fo

years all for indecent exposure in april of '96 he was unfounded guilty of a misdemeanor another macmanus demeanor in mid he fell to register as a sex offender and 2005. you have been warned in need to stop filming him if you do not turn it off i am guided take it and why want to turn it off i want you to get away from ipad eyewashes the family may out a call the cops and manpower that is why he did one of the videotapes at this point i got of the police department involved they refused to comment on a matter he is a registered sex offender walk around naked on san francisco's streets makes you wonder how many more sex offenders are heading toward are very uncommon >> mark have felt is a registered sex offender a spokesman at the for the attorney a general's office had doesn't mandate and not all sex offenders do must register but all of all information is made available to the proper he and others have the right to walk around completely naked with some exceptions >> in a televised simply walking around naked in the castro section of san francisco is not breaking the law the law also sta

have to give credit to her or her partner, tristan macmanus.os. caught up with all of them to see what it will talk to dance their way to the mirror ball trophy. ♪ ♪ >> reporter: from different worlds but share much in common. 29-year-old tristan macmanus considered a pro dancing purist. by his student nancy grace. >> you will not see him rip off his shirt or do a stunt. >> unlike val chmerkovskiy with elisabetta canalis. tristan started dancing in dublin, ireland, his other passion was futbol, we call soccer. >> people never knew i danced until i was 16, 17. i used to go play football matches in the morning and go straight from my football game to the dance competition. >> reporter: tristan has won competitions all over the world. and so has val. check out this home video his parents gave to "good morning america" of 8-year-old val chmerkovskiy. and his teenage brother max. yep, that's young max. they first learned to dance in odessa ukraine, before moving to brooklyn. dance as a boy was probably not the most popular of activities? >> yeah, it

debuts on "dancing with the stars" on monday, but just her last hour she and her partner tristan macmanus. >> nancy is doing great. she is picking up everything. >> good. >> she listens -- >> good. >> she listens to what she wants to hear. >> go ahead. go ahead. listen, this is the deal, day one dance practice, i'm minding my own business, i'm trying to do the cha-cha-cha and then i hear, no, no, no! i'm, like, what? >> you're getting some of your own medicine, nancy. >> talking to me. there was a little slap involved. what? >> nancy is a professional dancer now and i'll treat her as such. >> looking at the video there's nothing professional going on on my part anyway. >> i think your cha-cha looks pretty good. tristan, did you have any idea how big of a name you are dealing with here? you know nancy's reputation, she'll eat you alive, pal, if you go against anything she says. >> yeah, she's trying to. she's trying to. i didn't have any -- i didn't have any worries going in -- >> did you feel that? did you feel that? >> i think, yeah, i didn't have any worries coming in, because to be hon