Hosts

Bob Costas (Opening Ceremony and primetime host, pictured left): 20-time Emmy winner serves as NBC's primetime host for the eighth time; working his ninth Olympics overall, dating to Seoul in 1988; has the longest tenure of NBC's sports announcers, dating to 1980.

Al Michaels (daytime host): Makes his NBC Olympic debut, working his fifth Games overall, after a 22-year absence and 30 years removed from his legendary "Do you believe in miracles? Yes!" call during the 1980 Lake Placid Games; last covered hockey and hosted the Closing Ceremony at the 1988 Calgary Games.

Mary Carillo (late night host/correspondent): Hosting late-night coverage for the second time; working her 10th Olympic Games and seventh with NBC.

Bill Patrick (daytime hockey host): Making his second appearance as a full-time Olympic host.

Fred Roggin (daytime curling host): Working his sixth Olympics assignment for NBC; hosted CNBC and MSNBC's curling coverage from Turin in 2006.

Correspondents

Cris Collinsworth: Third Olympic assignment for NBC and first Winter Games; covered track and field in Atlanta in 1996 and provided on-the-scene reports from Beijing in 2008.

Dick Button: Two-time Olympic gold medalist (in men's figure skating at the 1948 and 1952 Games); has more experience at the Olympics than any NBC commentator, appearing at his 17th Winter Games, dating to Squaw Valley in 1960; second Olympics assignment for NBC.

Sports desk reporters

Lester Holt (fourth Olympics assignment); Jimmy Roberts (sixth Olympics); Peter Alexander (second Olympics); Alex Flanagan (second Olympics); Dwight Stones (three-time Olympian, 10th Olympics as reporter).

Commentators, sport by sport

Alpine skiing: Tim Ryan (play-by-play, ninth Olympics); Todd Brooker (former Olympian; third as analyst); Christin Cooper (two-time Olympian, silver medalist in 1984, fifth as analyst); Steve Porino (third Olympics as reporter).

Bobsled/luge/skeleton: Bob Papa (play-by-play, eighth Olympics); Lewis Johnson (sixth Olympics as reporter); John Morgan (bobsled analyst, eighth Olympics); Duncan Kennedy (three-time Olympian, luge analyst, third Olympics as broadcaster); Lea Ann Parsley (Olympic silver medalist, skeleton analyst).

Cross country/biathlon: Al Trautwig (play-by-play, 13th Olympics); Chad Salmela (second Olympics as analyst).

Curling: Andrew Catalon (play-by-play, second Olympics); Don Duguid (fifth Olympics as analyst); Colleen Jones (eighth Olympics as analyst); Elfi Schlegel (reporter, 10th Olympics).

Figure skating: Tom Hammond (play-by-play, ninth Olympics); Scott Hamilton (two-time Olympian, gold medalist in 1984, fifth as analyst); Sandra Bezic (former Olympian; third as analyst); Tracy Wilson (former Olympian, bronze medalist in 1988, third as analyst); Andrea Joyce (reporter, 10th Olympics).

Freestyle skiing: Todd Harris (play-by-play, second Olympics); Jonny Moseley (two-time Olympian, gold in 1998); Tina Dixon (reporter, second Olympics).

Hockey: Mike Emrick (play-by-play, sixth Olympics); Kenny Albert (play-by-play, third Olympics); Cammi Granato (two-time Olympian, gold medalist in 1998, silver in 2002, second Olympics as analyst); A.J Mleczko (two-time Olympian, gold medalist in 1998, silver in 2002, second Olympics as women's hockey analyst); Pierre McGuire (reporter, second Olympics); Joe Micheletti (game analyst, sixth Olympics); Mike Milbury (studio analyst); Ed Olczyk (analyst); Jeremy Roenick (former Olympian, silver medalist in 2002, studio analyst).

Short track speed skating: Ted Robinson (play-by-play, seventh Olympics); Andy Gabel (four-time Olympian, silver medalist in 1994, analyst); Andrea Joyce (reporter).

Ski jumping: Matt Vasgersian (play-by-play, fourth Olympics); Jeff Hastings (former Olympian, seventh Olympics as analyst).

Snowboarding: Pat Parnell (play-by-play, second Olympics); Todd Richards (former Olympian, second Olympics as analyst); Tina Dixon (reporter).

Speed skating: Dan Hicks (play-by-play, eighth Olympics); Dan Jansen (four-time Olympian, gold medalist in 1994, fourth as analyst); Andrea Kremer (second Olympics as reporter).