Man about town! Jack Osbourne leaves the Sunset Marquis with a friend after  busy week in LA

By  Daily Mail Reporter

PUBLISHED: 20:33 EST, 15  June 2013 |  UPDATED: 20:33 EST, 15 June 2013

Jack Osbourne has come a long way since the  day he first checked into rehab ten years ago.

Now celebrating the milestone period of time  that he’s been the sober, the reality star has never been busier.

Jack left the Sunset Marquis hotel with a  friend on Saturday after a busy week making appearances at various events around  Hollywood.

Heading home: After a busy week at various events in Los  Angeles, Jack Osbourne heads out of the Sunset Marquis on Saturday

On Monday, Osbourne showed up to the 2013  Television Critics Choice Awards looking quietly dapper in a black suit, blue  shirt and red bow  tie.

He was one of the presenters onstage, beside  the beautiful So You Think You Can Dance host Cat Deely.

Two days later, he was spotted making the  rounds at the annual E3 convention at the downtown Los Angeles convention  center.

The massive convention features the newest in electronics and gaming for each year and always caters to a wide variety of celebrities.

While making the rounds, Osbourne took a few  pictures with the new, oafish GoDaddy.com spokesman Jesse Heiman.

Looking good: Jack looks entirely different than he did  a decade before when he was a reality star

Nicely put together: The ex-reality star looks well put  together these days

The reality series star has truly turned his  life around over the past decade.

He celebrated ten years of sobriety at the  end of April with his wife Lisa Stelly and his one-year-old daughter Pearl  Clementine.

On the anniversary of when he put drugs and  drink aside, Osbourne even tweeted: ‘Well I never thought this was gonna happen  10 years ago.’

However, he’s had to overcome even more  personal obstacles than managing his own will power.

In June of 2012, Osbourne revealed he had  been diagnosed with relapsing remitting multiple sclerosis.

Yet judging by his recent busy week in Los  Angeles, the rock legend’s son isn’t letting the disease  win.