Sonny Bill Williams' wife Alana has launched an equipment hire company for the ultimate kids' sleepover.

The mother-of-two started Slumber Bumba - "sleepovers 2 envy" - to "help busy parents and create great memories for kids," according to the company's website.

The business rents items for themed sleepovers in Sydney and Auckland, with prices starting at $220 for five kids.

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Available themes on the Slumber Bumba website included 'sports talk', a sports-themed package, which comes with everything from sheets and blow up mattresses to bunting, fairy lights and mini basketball hoops with balls.

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There are also a number of colour and pattern inspired packages including 'pretty pastels' and 'polka dot crazy', all of which can be customised.

Slumber Bumba also offers a delivery and set up service.

Williams has shared his excitement about Alana's new company - a joint venture with her aunties - on social media, with some amazing photos from sleepovers.

"My wife is my no1 supporter, so seeing her hard work come together makes me happy [sic]," he said on Instagram.

And he isn't the only fan. A number of people have posted on the company's Facebook page, describing the service as "divine" and "gorgeous".

Fingers crossed Slumber Bumba launches an adult sleepover package soon.