Josh Lewis is a character from the Brat Universe in the series Crown Lake. He is the son of the math instructor Dr. Lewis.
Josh was Nellie's boyfriend in season 1, until she realized that he made her fall for the girl rule. Nellie gets revenge by sneaking chocolate into his drink at Chloe's Slam Poetry open mic. He was also Chloe's love interest in the second half of season 2, where they are seen sharing a kiss.
It is unlikely, but possible that Josh could be Heather Masterson.