The actress, 42, made her relationship Instagram official on Wednesday. The post comes amid her ongoing divorce from her estranged husband Kyle Newman.
In the sweet photograph, King is seen gazing adoringly at her beau as he wraps his arms around her.
"I love you ❤️," she captioned the photo.
King's friends left supportive comments for the pair, who were first spotted together back in December.
"Im happy when you're happy! F--- everything and anyone else," wrote one supporter as another commentator added, "You guys are my favorite! ❤️❤️."
Devermont is an activist known for creating the Mr. Checkpoint app, which enables users to film police officers during traffic interactions.
In May 2020, King filed for divorce from Newman, 45, after 12 years of marriage. The actress also filed a domestic violence prevention petition and an emergency motion related to child custody and visitation, as well as a temporary restraining order.
In court documents previously obtained by PEOPLE, King claimed Newman was withholding their sons — James Knight, 7, and Leo Thames, 6 — from her. Newman responded with his own series of allegations against King, including claims of reckless behavior that endangered the children. (King has denied his allegations.)
Stefanie Keenan/Getty Images for Barneys New York
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In court documents later filed on Nov. 4 and obtained by PEOPLE, Newman requested full physical custody of the exes' sons, with King having supervised visitation on alternating weekends and one night a week.
Newman specified in the docs, "I have been the children's primary caretaker since their birth and the children have spent the large majority of 2020 in my sole custody."
"Once again, Kyle's lawyers have filed selectively redacted documents which perpetuate a false narrative about Jaime. Jaime's utmost priority has been the well-being of her children and she will continue to pursue this privately for their sake," King's rep previously told PEOPLE in a statement.
Since then, Newman welcomed a son, Etienne Noel Newman, on Feb. 18 with his girlfriend, singer Cynthia Nabozny, 28, a source previously confirmed exclusively to PEOPLE.