Meghan Trainor is now all about the laughs. The singer has sealed a major overall deal with NBCUniversal Television and Streaming Entertainment that includes a comedy series in development.

Trainor will star in and help develop the sitcom for NBC, but there is no concept or writers attached just yet. The comedy is the first project under the cross-platform deal, which is the first of its kind under the new NBCU Television and Streaming Entertainment structure under Susan Rovner.

The deal will also include other potential projects across scripted and unscripted content for NBCU’s various network, cable, streaming and syndication programming outlets,...