Bob Costas to host the closing ceremony of the Games of the XXX Olympiad on NBC with Al Michaels and Ryan Seacrest

Closing ceremony celebrates London in spectacular fashion with "A Symphony of British Music" and the athletes of the London Olympics; coverage begins Sunday at 7 p.m.

NBC's Olympic primetime host Bob Costas will host the London 2012 Olympic Games Closing Ceremony from Olympic Stadium alongside co-hosts Al Michaels, the host of NBC's Olympic daytime coverage, and Ryan Seacrest, Olympic primetime correspondent. The closing ceremony will follow "London Gold," a special presentation of the top moments and athletes of the 2012 Olympics. Coverage begins Sunday at 7 p.m.

Part of the closing ceremony will be "A Symphony of British Music," celebrating one of Britain's strongest cultural exports over the past 50 years, and featuring world-famous British musicians.

In the tradition of the Olympic closing ceremony, London will hand over the Olympic flag to Rio, the host of the next Summer Olympics in 2016. The flag will be turned over to Rio Mayor Eduardo Paes and there will be a samba- and Carnival-flavored cultural presentation by the next host city.

The Closing Ceremony features 4,100 performers - 3,500 adult volunteers and 380 schoolchildren from the six East London host boroughs.

LONDON GOLD: Preceding the Closing Ceremony, NBC Olympics will present "London Gold"(7 to 8:30 p.m.). Hosted by Costas and Michaels, "London Gold" is a special presentation of the top moments and athletes of the 2012 Olympics, with features providing a fresh perspective on some of the most compelling stories of the Games that viewers haven't seen before.

ANIMAL PRACTICE: Immediately following the closing ceremony, as previously announced, NBC will air a full episode of a commercial-free network preview of the new comedy, "Animal Practice."

LONDON CLOSING PARTY: Following late local news is the "London Closing Party," with special musical guests, which will wrap up the unprecedented 5,535 hours of coverage from the London Olympic Games.

CLOSING CEREMONY STREAMED LIVE: The entire Closing Ceremony will be streamed live on www.NBCOlympics.com and on the NBC Olympics Live Extra App on mobile devices and tablets beginning at 4 p.m. to cable, satellite and telco customers who verify their subscriptions.

SUNDAY NIGHT NBC OLYMPICS SCHEDULE:

London Gold - 7-8:30 p.m. ET/PT

Closing Ceremony - 8:30-10:58 p.m. ET/PT

Preview of "Animal Practice" - 10:58-11:20 p.m. ET/PT

Local News - 11:20 p.m.-Midnight ET/PT

Closing Party - Midnight-12:35 a.m. ET/PT

The 2012 London Olympics is Costas' 10^th for NBC and his ninth as primetime host. After serving as late night host in 1988 from Seoul, South Korea, Costas, a 23-time Emmy Award-winner, earned acclaim for his work as primetime host from Barcelona, Atlanta, Sydney, Salt Lake City, Athens, Torino, Beijing and Vancouver. Costas, who has the longest tenure of the network's sports commentators, joined NBC in 1980.

Michaels, one of the most renowned commentators of all-time and whose legendary "Do you believe in miracles? Yes!" call at the 1980 Lake Placid Winter Olympic Games 32 years ago stands as one of the most famous calls in sports history, is NBC's weekend and weekday Olympic daytime host, his second straight Olympics for NBC. Michaels was the daytime host at the Vancouver Winter Olympic Games in 2010, his first Olympic broadcast assignment in 22 years, when he covered hockey and hosted the closing ceremony at the 1988 Calgary Winter Olympics for ABC.

Emmy Award-winning producer and broadcaster Seacrest made his Olympic broadcasting debut in London. He served as a contributor for NBC's primetime coverage from London, as well as joined "Today" as a special correspondent throughout the Games, and contributed to E! News programming.

For more on NBCUniversal's Olympic coverage, visit NBCOlympics.com.