Apple is planning to launch an update to iCloud at its Worldwide Developers Conference in June, according to reports.

The Wall Street Journal claims that the update will include a new photo-sharing functionality. The photo-sharing service “will allow iCloud users to share sets of photos with other iCloud users and to comment on them,” says the report.

Currently, Apple’s Photo Stream allows users to sync photos between devices registered to the same Apple ID, but this new photo-sharing feature would allow users to share photos with friends. The report also suggests that iCloud will allow video syncing, which is currently not supported in Photo Stream.

Notes and Reminders icons were spotted on a beta.cloud.com site discovered by developer Steve Troughton-Smith on Friday, suggesting that these features will also be added in the iCloud update.

There was an additional space on the beta site for another service, but the image link was broken so it was unable to be identified. The beta site has now been taken offline.

Last week, a Notifications test banner was also spotted on the iCloud.com site, adding further evidence that Apple is working on an update to the service.

It is expected that the iCloud update could be part of iOS 6, which could also be putting in an appearance at WWDC, beginning 11 June. iOS 6 could be bringing Siri to the iPad, according to reports.

It looks like this year’s WWDC could be a busy one, with reports that a new MacBook Pro, MacBook Air and iMac will be arriving at the event in San Francisco alongside the aforementioned iCloud update and iOS 6. The new Macs are expected to run Apple’s new operating system, OS X 10.8 Mountain Lion, which is also set to launch at the conference.

Check out our Mid-month rumour round up for the latest on new Macs, iOS 6, Apple’s HDTV and next-generation iOS devices.

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