Under the deal, part of the company’s 'Thank you, Mum' campaign, the pair will partner Pampers, Olay, and Venus, to celebrate mums in the UK.
"[P&G] are celebrating my own mum, who has been a driving force and inspiration in helping me realise my dreams," said Ennis-Hill, who is a mother herself.
"She’s been a huge influence and support, so it means so much that P&G and all their brands, that support mums every day, are recognising her as well".
The campaign will run across a variety of media channels. P&G Olympic Games-themed athlete packaging, end caps and displays will also be on show in retailers.
P&G is a TOP partner of the International Olympic Committee.