van Dyne assisted Hank Pym as the Wasp when he took on missions for S.H.I.E.L.D. Pym and van Dyne could both shrink in size, but increase in strength, due to Pym Particles. On one mission to disable a Soviet nuclear missile, van Dyne shrunk to into the subatomic quantum realm to succeed, which would be impossible to come back from, resulting in her apparent death. Pym grew distant from his daughter, Hope, at this moment, which caused years of friction, due to him never revealing what had happened.
- Ant-Man (2015, Hayley Lovitt portrays young Janet)
- Ant-Man and the Wasp (2018)
- Avengers: Endgame (2019, cameo, no lines)
- Hayley Lovitt is used as a reference for the young Janet in Ant-Man and the Wasp.