The chief executive of YourView, which was founded by the BBC, ITV and BT, has quit to take on a senior role at TalkTalk.
Susie Buckridge has been named as the Salford-headquartered group's general manager of group product, a newly-created job.
YourView is co-owned by TalkTalk, BT, BBC, ITV, Channel 4 and Channel 5.
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Susie Buckridge had been CEO of YourView since February 2019, having first joined in March 2010.
She has previously worked for the likes of EY, Deloitte and the BBC.
She will now lead a new group product practice across TalkTalk's consumer, wholesale and B2B business units.
TalkTalk CEO Tristia Harrison said: "We are delighted to welcome Susie to TalkTalk.
"She is a strong product innovator with deep experience in software delivery and bringing simple frictionless products to market.
"Susie’s experience at YouView and at the BBC cements our commitment to offering UK consumers simple affordable content streamed via super-fast Full Fibre Connectivity."
Susie Buckridge added: "TalkTalk has always been innovative and challenged the status quo.
"As we move to a Full Fibre and Smart Home world, TalkTalk is uniquely free to offer the great products and offerings that will transform our connected lives. I look forward to joining the team."