However she wasn't so cool, calm and collected before the red carpet.
Lili took to her Twitter to let her fans know that she had a HUGE wardrobe malfunction right before the show.
“The waist-band of my dress was held together by two strings and one of them completely ripped as I was being zipped up,” she wrote, alongside a hilarious gif.
“So after dealing with that sh-t show and having one of my bffs @taylrfostr stitch me back together in 10 minutes, I was thrilled to be there,” she finished.
Honestly, you never would have known.
Lili also picked up the Choice TV Ship award with Cole, and Riverdale legit wiped the floor clean with awards.