In "Weekend at Bernie's," a real body was not used. Instead, the filmmakers employed a combination of a lifelike dummy and a skilled actor, Terry Kiser, who portrayed Bernie Lomax. Kiser played Bernie's living character in the film's initial scenes and then performed as the "dead" body using a dummy for most of the subsequent scenes. The use of practical effects and Kiser's performance contributed to the film's comedic portrayal of the situation.

There is no "Weekend at Bernie's Part 3." The original film, released in 1989, was followed by a sequel, "Weekend at Bernie's II," in 1993. Although both films became cult classics, there has been no official announcement or production of a third installment. Over the years, there have been discussions and rumors about a potential sequel or remake, but nothing has come to fruition as of now. The franchise remains limited to the two films released in the late '80s and early '90s.

No, Meryl Streep was not in "Weekend at Bernie's." The 1989 comedy film stars Andrew McCarthy and Jonathon Silverman as two young men who try to maintain the illusion that their deceased boss, Bernie Lomax, is still alive during a weekend getaway. The film features other actors, but Streep is not among them.

As of my last update in October 2023, "Weekend at Bernie's" is not available on Netflix or Hulu. Streaming availability can change frequently, so it's best to check directly on those platforms or use a service like JustWatch to see where the movie can be currently streamed.