Today, June 14th, marks the start of HotS first official ranked season. Here's the official word from Blizzard:

In case you hadn’t heard by now, preseason play is about to wrap up as we prepare to introduce Heroes of the Storm’s first official ranked season. Alongside the arrival of Season 1, we’re also completely revamping the ranking system, offering a host of new rewards for Hero and Team League players, making significant matchmaking adjustments, and even adding a Grandmaster Leaderboard to the official Heroes website. Today, we’d like to reveal start and end dates for Ranked Season 1, as well as all of the rewards you’ll be able to earn simply by playing!

Season 1 should be a much-needed shot in the arm for the Heroes of the Storm, especially after last year's champs announced they are quitting the game.

Rewards range from new portraits to a multichromatic elemental lizard mount (pictured below).

For full details, head to the official site.