"Mary Poppins" is a song from the 2015 stage musical "Love Birds" with music and lyrics by Robert J. Sherman.
 It is sung by "The Original Quack Pack", a penguin barbershop quartet who resemble the penguins from the 1964 Walt Disney motion picture, "Mary Poppins".
 In dialogue leading up to the song, the penguins explain that while they did know the same nanny, (Mary Poppins) they are not the same penguins as in the movie.
 The song expresses their longing for the magical nanny of literary fame.
Mary Poppins Returns (also known as Mary Poppins 2) is an upcoming American musical fantasy film directed by Rob Marshall and written by David Magee.
 It is the sequel to the 1964 film "Mary Poppins".
 The film stars Emily Blunt, Lin-Manuel Miranda, Ben Whishaw, Emily Mortimer, Pixie Davies, Joel Dawson, Nathanael Saleh, Julie Walters, Colin Firth, Dick Van Dyke and Meryl Streep.
 Set 25 years after the 1964 film, it will feature Mary Poppins, the former nanny of Jane and Michael Banks, re-visiting them after a family tragedy.
 The film is scheduled for release on December 25, 2018, giving it one of the longest gaps between film sequels in history.
Underdog is a 2007 American family superhero comedy film based on the 1960s cartoon series of the same name.
 Directed by Frederik Du Chau and written by Joe Piscatella, Adam Rifkin, and Craig A. Williams, the film stars Jim Belushi, Peter Dinklage, John Slattery, and Patrick Warburton with the voice talents of Jason Lee, Amy Adams, and Brad Garrett.
 Unlike the TV series, the Underdog character is portrayed as a regular dog rather than an anthropomorphic one.
 Underdog, voiced by Jason Lee, was played by a lemon beagle named Leo sporting a red sweater and a blue cape.
 The film grossed $65.3 million worldwide.
Robert Bernard Sherman (December 19, 1925 – March 6, 2012) was an American songwriter who specialized in musical films with his brother Richard Morton Sherman.
 According to the official Walt Disney Company website and independent fact checkers, "the Sherman Brothers were responsible for more motion picture musical song scores than any other songwriting team in film history."
 Some of the Sherman Brothers' best known songs were incorporated into live action and animation musical films including: "Mary Poppins", "The Jungle Book", "The Many Adventures of Winnie the Pooh", "Chitty Chitty Bang Bang", "The Slipper and the Rose", and "Charlotte's Web".
 Their most well known work, however, remains the theme park song "It's a Small World (After All)".
 According to Time.com, this song is the most performed song of all time.
Richard Morton Sherman (born June 12, 1928) is an American songwriter who specialized in musical films with his brother Robert Bernard Sherman.
 According to the official Walt Disney Company website and independent fact checkers, "the Sherman Brothers were responsible for more motion picture musical song scores than any other songwriting team in film history."
 Some of the Sherman Brothers' best known songs were incorporated into live action and animation musical films including: "Mary Poppins", "The Jungle Book", "The Many Adventures of Winnie the Pooh", "Chitty Chitty Bang Bang", "Snoopy Come Home", "Bedknobs and Broomsticks", "The Slipper and the Rose", and "Charlotte's Web".
 Their most well known work, however, remains the theme park song "It's a Small World (After All)".
 According to Time.com, this song is the most performed song of all time.
"Chim Chim Cher-ee" is a song from "Mary Poppins", the 1964 musical motion picture.
 It was originally sung by Dick Van Dyke and Julie Andrews, and also is featured in the Cameron Mackintosh/Disney "Mary Poppins" musical.
 The song can be heard in the "Mary Poppins" scene of The Great Movie Ride at Disney's Hollywood Studios and during the "Mary Poppins" segment of "" at Disneyland.
Mary Poppins Opens the Door is a British children's fantasy novel by the Australian-British writer P.L. Travers, the third book and last novel in the "Mary Poppins" series that features the magical English nanny Mary Poppins.
 It was published in 1943 by Harcourt, Brace & World, Inc and illustrated by Mary Shepard and Agnes Sims.
Lin-Manuel Miranda ( ; born January 16, 1980) is an American composer, lyricist, playwright, and actor best known for creating and starring in the Broadway musicals "Hamilton" and "In the Heights".
 He co-wrote the songs for Disney's "Moana" soundtrack (2016) and is set to star in their upcoming film "Mary Poppins Returns".
 Miranda's awards include a Pulitzer Prize, two Grammy Awards, an Emmy Award, a MacArthur Fellowship, and three Tony Awards.
"Step In Time" is a song and dance number from Walt Disney's 1964 film "Mary Poppins", and it is composed by Richard M. Sherman and Robert B. Sherman.
 The choreography for this song was provided by Marc Breaux and Dee Dee Wood.
 It is sung by Bert, the chimney sweep (Dick Van Dyke) and the other chimney sweeps on the rooftops of London.
 In the first part of the song, the lines he says in the verses are "Kick your knees up", "'Round the chimney", "Flap like a birdie", "Up on the railing", "Over the rooftops" and "Link your elbows" followed by an interlude.
 The interlude continues with Bert, Mary Poppins, Michael, Jane and all the chimney sweepers dancing around the rooftops and as Admiral Boom looks at them with the telescope, he thinks that they're Hottentots, so he orders Mr. Binnacle to make them scram with colorful fireworks.
 In the second part, as all the chimney sweepers get in the house of George Banks, Mrs. Brill walks into the living room looking at them and screams, "They're at it again!"
 and she runs away trying to strike one of the chimney sweepers with a frying pan.
 As Jane, Michael, Mary Poppins and Bert get in the same place, Ellen runs around the dining room with an "OW!"
 and the chimney sweepers flip her.
 The other phrases in the rest of the musical number are "Votes for women," "It's the master," and "What's all this?"
Mary Poppins is a 1964 American musical-fantasy film directed by Robert Stevenson and produced by Walt Disney, with songs written and composed by the Sherman Brothers.
 The screenplay is by Bill Walsh and Don DaGradi, loosely based on P. L. Travers' book series "Mary Poppins".
 The film, which combines live-action and animation, stars Julie Andrews in the role of Mary Poppins who visits a dysfunctional family in London and employs her unique brand of lifestyle to improve the family's dynamic.
 Dick Van Dyke, David Tomlinson, and Glynis Johns are featured in supporting roles.
 The film was shot entirely at the Walt Disney Studios in Burbank, California using painted London background scenes.

Question: Are the films Underdog and Mary Poppins Returns both musical films?
Answer: no