The youngest person to reach space is Oliver Daemen, who was 18 years and 11 months old when he made a suborbital spaceflight on Blue Origin NS-16.
ðə jˈʌŋɡɪst pˈɜːsən tə ɹˈiːtʃ spˈeɪs ɪz ˈɑːlɪvɚ dˈiːmɛn, hˌuː wʌz ˈeɪtiːn jˈɪɹz ænd ɪlˈɛvən mˈʌnθs ˈoʊld wɛn hiː mˌeɪd ɐ sʌbˈoːɹbɪɾəl spˈeɪsflaɪt ˌɔn blˈuː ˈɔːɹɪdʒˌɪn ˌɛnˈɛs sˈɪkstiːn.