The TV show 'Laverne & Shirley' was a spin off from which American sitcom?

Laverne & Shirley is an American sitcom that ran on ABC from January 27, 1976, to May 10, 1983. It starred Penny Marshall as Laverne DeFazio and Cindy Williams as Shirley Feeney, single roommates who work as bottlecappers in a fictitious Milwaukee brewery called Shotz Brewery.

The show was a spin-off from Happy Days, as the two lead characters were originally introduced on that series as acquaintances of Fonzie (Henry Winkler). Set in roughly the same time period, the timeline started in approximately 1958, when the series began, through 1967, when the series ended. As with Happy Days, it was made by Paramount Television, created by Garry Marshall, and the executive producers were Garry Marshall, Edward K. Milkis, and Thomas L. Miller.

Happy Days and Laverne & Shirley had a crossover episode, "Shotgun Wedding", in which Richie and Fonzie get into trouble with a farmer for courting his daughters and Laverne and Shirley try to help them. Part one is the season seven premiere of Happy Days and part two is the season five premiere of Laverne & Shirley.