YouTube comedy star and actress Grace Helbig has joined Studio71’s creator network, and under the pact she’s developing a new comedy series with longtime collaborator and pal Mamrie Hart.

Helbig previously was affiliated with Fullscreen Media. Under her deal with Studio71, the digital-media company will help manage Helbig’s online-content strategy.

Among Helbig’s projects with Studio71 will be an untitled comedy series with Hart, who also is affiliated with Studio71, that is slated to launch in 2018 on YouTube.

“We are excited to be working with Studio71, innovators who are unafraid to push boundaries,” Helbig and Hart said in a joint statement.

Last year, Helbig signed an overall deal with Lionsgate to develop both films and TV series — including a romantic-comedy feature film co-starring Helbig and Mamrie Hart.

Helbig and Hart have worked together on numerous projects, and often with fellow YouTube star Hannah Hart (who is not related to Mamrie). The trio, dubbed YouTube’s Holy Trinity, have collaborated and starred in Lionsgate’s comedy film “Dirty 30” last year and 2014 indie movie “Camp Takota.” In 2015, Helbig hosted “The Grace Helbig Show” late-night show on E!, which aired for eight episodes but was not renewed after low ratings.

“Grace and Mamrie are supremely talented comedians and creators. We are thrilled to continue to work together and bring their distinct voice and vision to life with this new project,” Studio71 president Dan Weinstein said in announcing the deal.

Studio71’s talent network includes Lilly Singh (a.k.a IISuperwomanII), Rhett & Link, Logan Paul, Matthew Santoro, Flula Borg, Epic Meal Time, Roman Atwood, Hodge Twins, and Domo & Chrissy. In addition, Studio71 has partnerships to manage digital content for Mayim Bialik (“The Big Bang Theory”) and Dwayne “The Rock” Johnson.

Grace Helbig is repped by WME and managed by Bleecker Street. Mamrie Hart is repped by CAA and Bleecker Street. L.A.-based Studio71 is owned by Germany’s ProSiebenSat.1 Group.