Rannells had his breakthrough in 2011 when he originated the role of Elder Price in The Book of Mormon, a musical written by South Park creators Trey Parker and Matt Stone and Avenue Q composer Robert Lopez.
ɹˈænəlz hæd hɪz bɹˈeɪkθɹuː ɪn tˈuː θˈaʊzənd ɪlˈɛvən wɛn hiː ɚɹˈɪdʒᵻnˌeɪɾᵻd ðə ɹˈoʊl ʌv ˈɛldɚ pɹˈaɪs ɪnðə bˈʊk ʌv mˈɔːɹmən, ɐ mjˈuːzɪkəl ɹˈɪʔn̩ baɪ sˈaʊθ pˈɑːɹk kɹiːˈeɪɾɚz tɹˈeɪ pˈɑːɹkɚ ænd mˈæt stˈoʊn ænd ˈævənˌuː kjˈuː kəmpˈoʊzɚ ɹˈɑːbɚt lˈoʊpɛz.