Playing Grandpa Quill in the film is actor Gregg Henry, a frequent collaborator of writer/director James Gunn.
Henry previously appeared in Gunn's films Slither, Super, and lent his voice to the Gunn-penned film The Belko Experiment and video game Lollipop Chainsaw.
In case you needed a reminder this scene was set in the 1980s, there's a portrait of President Ronald Reagan in the background.
Peter's dying mother Meredith is played by actress Laura Haddock, who actually previously appeared in another MCU movie, playing a fan eager for an autograph in Captain America: The First Avenger.
The name for the planet in the film actually comes from the first Kree leader in the pages of Marvel Comics.
In addition, the coordinates for the planet are real coordinates in the Andromeda galaxy!
The projection of the dog seen here is actually director James Gunn's own dog, Dr. Von Spears.
Peter's... friend... that he forgot was on board his ship is actually a character from Marvel Comics as well.
The coordinates for locations in Guardians of the Galaxy are either A) A real Place that has been spotted and coordinated in the Andromeda Galaxy, or B) Made-up numbers that when placed into a number-to-letter puzzle create a message.
The location of the Dark Astyr translates to "This is Moms Cancer," which shouldn't exactly be taken literally, but is more in reference to Peter's journey in the film itself.
Lee is credited as the Xandarian Ladies' Man in the film, spotted here by Rocket in the film.
The Broker is actually a very minor character from the pages of Marvel Comics.
Among the artifacts in The Broker's shop is a reference to the Universal Church of Truth, a group of antagonists from the pages of Marvel Comics who previously battled the Guardians of the Galaxy.
Gamora is noted as "The last of the Zehoberei people," which isn't entirely true and is something that James Gunn has noted is the one thing he'd like to change about the movie.
Two major references in Rocket's file are his home planet, Halfworld, and his associate, Lylla.
Groot's original origin from Planet X is referenced in his mugshot.
The coordinates of the space prison The Kyln reveal that it is in fact, not real.
Since Peter Quill was abducted from Earth in the 1980s, his references are all a little dated, like when he calls Groot by the name of a classic Shel Silverstein book.
On the left is Troma founder Lloyd Kaufman, a friend and mentor to James Gunn, as a prison inmate.
The alien on the left is voiced by Nathan Fillion, a fan favorite and frequent collaborator with Gunn.
Here we finally learn that Peter Quill's ship is named after actress Alyssa Milano.
Another old school reference from Quill. referencing the cartoon Raccoon character from the children's nature magazine.
Among The Collector's collection is a Dark Elf as seen in Thor: The Dark World.
The location of Knowhere is important in Marvel Comics as it previously functioned as the Guardians' base of operations.
Also featured is a member of the Chitauri from The Avengers, as well as...
Cosmo! The talking space dog previously launched to the stars from Russia in the pages of Marvel Comics.
Though he won't appear front and center until the post-credits scene, Howard the Duck can be seen earlier in the film in another container.
There in the back is the same pod many theorized would be the container of hero Adam Warlock, though James Gunn has now confirmed it's simply an early prototype of The Sovereign's pods.
The slugs from James Gunn's horror movie Slither are seen in another container.
This marks the first time that the six Infinity Stones are fully explained and also shown all together.
Pictured here is Eson the Searcher, a Celestial from the pages of Marvel Comics.
The Ravager ship's computer is voiced by musician-turned-filmmaker Rob Zombie, who has previously lent his voice to other James Gunn projects. So yes, Rob Zombie is in the MCU.
Composer Tyler Bates appears in the film as the Ravager whose eye Rocket really wants.
Writer/director James Gunn cameos as the Faceless Sakarin in the film.
Howard the Duck makes his official MCU debut in the post-credits scene of the film.
In the pages of Marvel Comics, Peter Quill is from Colorado but since writer/director James Gunn is from Missouri, the MCU's Peter Quill is from Missouri.
Laura Haddock returns as Peter's mother!
In the film, Peter has converted a Mattel's handheld football game into a tracker of some sort.
The small rat-like creatures seen in the first film make a return.
Drax stumbles upon a dancing Groot and watches for him to move, much like the mid-credits scene from the first film.
The highly-anticipated tape returns for the film, as we all knew it would.
Trash Panda is a more modern synonym for Raccoons, so it's a little surprising that Peter Quill would know it.
Howard the Duck returns along with Seth Green reprising as his voice.
Two members of the original Guardians of the Galaxy from 1970s Marvel comics are seen in the scene, played by Sylvester Stallone and Michael Rosenbaum.
Comedian Steve Agee appears in the film (seen here on the left). Agee previously collaborated with Gunn on his film Super.
Quill jokes he would tell people his dad was David Hasselhoff, and even keeps a photo of him.
As Groot tries to get Yondu his fin, he finally gets the cybernetic eye that Rocket wanted from the first movie.
Yondu's look from his original comic book appearance is finally complete with his new fin.
As Rocket, Groot and Yondu quickly travel throough space, they stumble upon a planet where two Kronan are fighting.
Quill exclaims that he 'sees it...Eternity' a reference to the Celestial, Eternity, from Marvel Comics.
This is a double Easter egg as Lee appears as an astronaut recounting all his other cameo appearances while standing around...
...The Watchers! In Marvel Comics, the Watchers are alien observers who cannot interfere with the major events of the Marvel U but instead watch and catalog what they've seen.
They laid the groundwork for a Hasselhoff cameo, and they got one!
Ego's true planet-sized form is shown, a reference to how he appears in the comic books.
James Gunn's parents, James Gunn Sr. and Leota Gunn, appear in the film and are credited as "Weird Old Man" and "Weird Old Man's Mistress."
The Nova Corps. planet from the first film is briefly seen during Ego's universal takeover montage.
Peter Quill's grandfather appears, albeit briefly, in the film and he's made a friend played by Damita Jane Howard.
Peter battles his father in the form of Pac-Man in the finale.
At Yondu's funeral, his various doo dads and trinkets from his console are placed around his body including the gem-Frog he took from The Broker in the first film....
...plus Peter's troll doll.
The psychic Russian space dog doesn't appear in the film but does make a cameo in the credits.
The line-up of the original Guardians of the Galaxy team appears together in one of the mid-credit scenes including Sylvester Stallone as Starhawk, Michael Rosenbaum as Martinex, Ving Rhames as Charlie-27, Michelle Yeoh as Aleta Ogord, with Miley Cyrus as the voice of Mainframe, and Krugarr.
Some credits in the closing credits transform into I Am Groot before appearing as their final credit, such as Post Production Supervisor Jennifer Bergman's here.
The arrival of Adam Warlock, a powerful and fan-favorite cosmic Marvel character, is teased at the end of the film.
Jeff Goldblum's Grandmaster from Thor: Ragnarok appears, quite inexplicably, in the credits for the movie.
Groot finally ages a little bit, now an adolescent he resents the other Guardians because of his hormones. This particular post-credit scene leads right into Avengers: Infinity War.
Howard gets one last cameo before the film closes
In addition to the other thanks and notices, a note appears that 'No Raccoons or tree creatures were harmed during the making of this film. The same cannot be said for handlers of said raccoons or tree creatures.'
David Hasselhoff appears one last time and quotes Groot from the finale of the first film.
The film closes out as Stan Lee asks The Watchers where they're going off to...