What is the meaning of the expression "walk your walk and don't look back"?

Read the two sentences. i cannot wait to see this movie. the main character is played by my favorite actress. which sentence expresses the same idea in a complex sentence? my favorite actress is in this movie, and i cannot wait to see it. my favorite actress, who plays the main character, is in this movie and i cannot wait to see it. i cannot wait to see this movie because the main character is played by my favorite actress. i cannot wait to see this movie and the main character is played by my favorite actress. which one is the answer i need asp someone me and