At 11:30 AM Pacific time today, fans interested in watching Walter Koenig‘s star ceremony may see it live.
The Koenig Star ceremony is the highlight of a two-day celebrated held in Hollywood during the 46th anniversary of Star Trek.
Koenig is the final original series cast-member to receive his star. The last one, James Doohan, received his in 2004.
The streaming may be seen here.
Source: Walk of Fame