Instacart head Fidji Simo will step down to join OpenAI as its chief of applications, CEO and co-founder Sam Altman said on Thursday, adding she will report to him and that he will remain head of the Microsoft-backed ChatGPT maker.

Simo, already a board member at OpenAI, will transition out of Instacart over the next few months and join the AI company full-time as Application CEO.

The woman behind Instacart’s successful IPO, Fidji Simo, is joining OpenAI’s C-suite. On Wednesday, OpenAI CEO Sam Altman announced Simo’s new role as CEO of applications. She will report directly to him after transitioning out of her current role at Instacart later this year.