Sometimes actors are as excited about upcoming movies as the cinema-going public.
So much so that they use their Hollywood weight to pester directors and casting directors to get them a part in those films.
Here are ten actors who weren't too famous to beg people for a job...
10. Daniel Craig - Star Wars: The Force Awakens
One of the most-hyped films of recent years was the return of Star Wars in the shape of 2015's The Force Awakens, and actors were queuing around the block to get a role in the space epic.
Daniel Craig was one of those actors, and being friends with The Force Awakens' director J.J. Abrams, spoke to him in a bid to get a role.
The pair cooked up a 'secret cameo' for Craig - as the storm trooper that Rey Jedi mind controls to release her shackles (watch it here).
Craig was made Stormtrooper JB - 007 - an allusion to his most-famous role - in the scene in which most audience members had no idea of the famous face in the white helmet.
9. Shailene Woodley - The Fault in Our Stars
For the adaptation of John Green's tear-jerking novel about a sixteen-year-old cancer patient who falls in love with a fellow cancer sufferer, Divergent star Shailene Woodley saw herself as the perfect actress to play the film's main character.
So much so, that the Golden Globe-nominated actress sent a long email to the book's author explaining her credentials.
Woodley explained: "I wrote [author John Green] a pretty lengthy email just sort of saying, 'I'm obsessed with you and your book and I would do anything to be a part of it. Please let me audition for you.’"
Green responded saying that he'd love to get her in for an audition, and despite not initially picturing Woodley for the part, he admitted that he was 'blown away' when she read for Hazel.
Green revealed: "We were all crying. It was actually sort of bad. But it was hers from that moment on."
The Fault in Our Stars was adored by teenage girls across the world and picked up a stack load of awards, helping Shailene Woodley to become a young Hollywood star along the way.
8. William H. Macy - Fargo
When William H. Macy did two script readings for the role of Fargo's Jerry Lundegaard, he became convinced that he was the right man for the part.
Having not heard back from The Coen Brothers, who had gone into production with Fargo, Macy flew to New York where they were working and begged the directorial duo for the part.
"I'm very, very worried that you are going to screw up this movie by giving this role to somebody else," Macy told them.
He added, jokingly "It's my role, and I'll shoot your dogs if you don't give it to me."
The Coens went with Macy, as he earned an Oscar nomination for Best Supporting Actor, while the Coens won the Best Original Screenplay Oscar, so they must have been pleased with their decision.
7. Chloe Grace Moretz - The Equalizer
Rising star Chloe Grace Moretz was desperate for a role in Training Day director Antoine Fuqua's movie The Equalizer, that she resorted to pestering him for the part.
After auditioning for the role of Russian teen hooker Tia, Moretz repeatedly contacted Fuqua about landing a part in the violent action thriller.
The Kick-Ass star told Loaded magazine: "I really wanted it. I fought to get an audition and then I kept emailing and texting him.
"I went back for more auditions and I would keep sending him messages about how I knew I could play this role. Finally he called me one day and said, 'You're the one'. I couldn't believe it. I was so happy."
In preparation for the role, Moretz, who was 17 at the time, spent time with sex workers to understand their experiences.
The Equalizer was a hit and has been lined up for a sequel, although Moretz has yet to confirm whether she will return.
6. Michelle Pfeiffer - Dark Shadows
Growing up, Michelle Pfeiffer was a huge fan of 1960s gothic soap opera Dark Shadows, so she got extremely excited when she heard the Tim Burton would be doing a film remake in 2012.
So much so, that she called the director that she worked with on Batman Returns as Catwoman and requested a part.
"I worked up the courage to call him and was very apologetic." She told Empire, "I didn't want him to feel obligated but I told him I was a huge fan and I would love to do it if he was making it."
"I was really uncomfortable doing it and I don't think I would have done it had I not known him."
Burton stayed true to his old Catwoman and cast Pfeiffer as the strict female head of the family, but unfortunately for them both, the cult TV show remake didn't fare well with fans and critics.
5. Jason Bateman - The Change-Up
The 2011 body swap comedy starring Jason Bateman and Ryan Reynolds is largely forgotten, so it's surprising about how passionately Bateman campaigned to get himself in the film.
Bateman explained in interviews: "I was very excited to read the script based on the fact I was going to be playing two parts - it's the funniest script I've ever read."
"When I finished it" he continued "I immediately emailed the studio and said, 'Please, please let me do this movie'."
The studio cast Bateman in the film, in which his overworked father-of-three swaps bodies with Ryan Reynolds' irresponsible, single man-child - and while a pretty solid comedy, no-one would agree with Bateman's assertion that it's the funniest script ever.
See also | 8 famous film roles that Michael Jackson wanted to play (and would have made unwatchable)
4. Channing Tatum - The Hateful Eight
Channing Tatum's role in Quentin Tarantino's 2015 Western was kept under wraps as he unexpectedly pops up well over halfway through the crime thriller.
To get the role, Tatum went a bit psycho and sending out many emails to gain the part.
Tatum essentially harassed Tarantino over the course of the month, telling Jimmy Fallon on The Tonight Show "I basically sent about an email a day for about a month just threatening any other actors that might be up for the role."
"I was just praying that no one really tough was up for the role."
Sure enough, Tatum landed the role of Jody Domergue, and despite only appearing for a very short amount of the film's runtime, made a big impact in Tarantino's latest blood-soaked bonanza.
3. Sally Field - Lincoln
Despite director Steven Spielberg thinking that she was too old for the role, Forrest Gump's momma was determined to play the wife of Abraham Lincoln in Spielberg's biopic of the famed president.
Field admitted she begged him to change his mind and consider him for the part, so the director offered her the chance to audition.
The Mrs. Doubtfire actress recalls: "Daniel is such a sweetheart that he flew over from his home in Ireland to screen test with me. I'll love him forever for that."
After acing the audition, Spielberg cast Field in the role, and her belief proved worthy, as she picked up a nomination for Best Supporting Actress for her performance.
2. Charlize Theron - A Million Ways to Die In the West
South African actress Charlize Theron has dazzled audiences with her performances in the likes of Monster, Mad Max: Fury Road and North Country, so fans will be surprised when they discover the actress begged to be in the Seth Macfarlane western comedy.
Theron explained: "I've been interested in comedy for a while, but it's been tricky because audiences know me so well doing something very different.
"The combination of this script and Seth directing was a slam dunk for me. I started begging instantly... I closed the script and started begging."
While Theron was excited about Macfarlane's project, the fans and critics weren't as enthusiastic as the film delivered a lukewarm response.
1. Kate Winslet - Titanic
When James Cameron was casting the lead female role in the love story aboard the doomed ship, Gwyneth Paltrow was reportedly in talks to play Rose DeWitt.
When she heard that Paltrow had turned it down, Kate Winslet jumped into action and bombarded Cameron's office with daily notes and phone calls from England explaining why she should be considered.
Cameron invited the relatively unknown Winslet to Hollywood to audition and screen test opposite Leonardo DiCaprio for the role.
After the audition, Winslet sent Cameron a single rose with a card signed "From Your Rose" and called the director, pleading: "You don't understand! I am Rose! I don't know why you're even seeing anyone else!"
Cameron relented and cast Winslet as his female lead, as she repaid the director's faith with a memorable performance that earned the epic tale 14 Oscar nominations, including a Best Actress nomination for Winslet.