Each conference from the E3 expo in Los Angeles will reveal new games for the first time, show anticipated trailers and, fingers crossed, offer a few surprises.
You can watch each of the conferences using the embedded video live streams below. We'll also be posting separate live blogs of each conference, which will go live 20 minutes before they begin, allowing you to catch up with any announcements you may have missed during and after the show.
Also be sure to join us for Nintendo's conference tomorrow (June 5) at 5pm UK time (12pm EST/9am PST).
> Follow Digital Spy's ongoing E3 2012 coverage
Microsoft press conference live stream:
BST: 5pm to 6pm
EST: 12pm to 1pm
PST: 9am to 10am
EA press conference live stream:
BST: 9pm to 10pm
EST: 4pm to 5pm
PST: 1pm to 2pm
Ubisoft press conference live stream:
BST: 11pm to midnight
EST: 6pm to 7pm
PST: 3pm to 4pm
Sony press conference live stream:
BST: 2am to 4am
EST: 9pm to 11pm
PST: 6pm to 8pm
You can also keep up to date through our dedicated E3 2012 page for the latest updates, as well as our Twitter account @digitalspygames for impressions and regular updates from the show floor.
Are you looking forward to today's E3 press conferences? Add a comment to the space below!