Martha Kelly has joined the cast of 'Spider-Man: Homecoming'.

The American comedienne is to appear in the Marvel Studios and Sony superhero blockbuster in as-yet unconfirmed role.

Kelly can currently be seen on FX comedy series 'Baskets'.

She is joining a stellar cast which includes Tom Holland as the webslinger in his first title appearance following his cameo in 'Captain America: Civil War'.

Other notable names attached to the project include Marisa Tomei as Aunt May, Robert Downey Jr. as Tony Stark/Iron Man, Michael Keaton as main supervillain The Vulture and Logan Marshall-Green as another baddie.

Zendaya portrays Michelle - one of Peter's high school classmates -Tony Revolori plays Peter's school rival Flash Thompson, while Tyne Daly, Hannibal Buress, Donald Glover and Martin Starr all appear in undisclosed roles.

'Spider-Man: Homecoming' is being directed by Jon Watts and is being produced by Marvel Studios President Kevin Feige and former Sony Pictures Chairperson Amy Pascal.

The movie is scheduled for a July 2017 release.