It was just announced today by Dove Cameron and confirmed by Marvel, that the Disney Channel star will be joining the cast of Agents of S.H.I.E.L.D. in their upcoming 5th season. However, nothing is known about what role she will play on the show.
The actress posted a video to her Instagram telling her fans she has news about what she has been up to, only to be interrupted by Coulson himself, played by Clark Gregg. We do not know if she will be a series regular or if she will just have a recurring role.
Source: Dove Cameron