Conversation so far:
who does sean astin play in lord of the rings
Sean Astin played Samwise Gamgee in The Lord of the Rings trilogy.
what archetypal role does samwise gamgee play in the lord of the rings trilogy
The hobbit Samwise is the chief supporting character of The Lord of the Rings, in which he fills an archetypal role as the sidekick of the primary protagonist, Frodo Baggins
what is samwise gamgee's profession at the beginning of the lord of the rings
At the beginning of the story, Sam is Frodo's gardener

Question: how does the character join the adventure
Self-contained rewrite: How does Samwise Gamgee join Frodo Baggins' adventure?