How I Met Your Mother Season 9 spoilers are increasing as the cast and crew have started filming their farewell season. Sitcom co-creator Craig Thomas and Alyson Hannigan (Lily Eriksen) have teased fans with some curious photos. Meanwhile, we've learned that the mother will be introduced in various ways throughout the show's final season.

In a report by Latinos Post, the titular role played by How I Met Your Mother Season 9 regular Cristin Milioti will be interacting with several characters.

"(Cristin Milioti will) be introduced to each character one by one. Each episode will cater to one specific character and how he or she meets and interacts with her." Information has been released that there will be 24 episodes in How I Met Your Mother Season 9. Now how many characters exactly will the mother meet?

How I Met Your Mother Season 9 Spoiler: Hello again, Barney's Brother!

In a TV Line report, Wayne Braydy of "Whose Line is it, Anyway" will reprise his role in How I Met Your Mother Season 9 as Barney Stinson's half-brother, James. Does he also meet the mother before Ted does? Earlier spoilers have revealed the gang will meet the mother ahead of Ted. Now it appears as though more characters will meet the mother first. And Ted is the last one.

"My first appearance of the season will involve me singing a little Kenny Rogers-and-Dolly Parton tune, and it's going to be really funny," Wayne told Matt Mitovich of TV Line.

"Hart of Dixie" star Rachel Bilson might also be seen in How I Met Your Mother Season 9 as Cristin's college roomie (flashback) and friend (flash forward). As Cindy, Rachel's character has revealed in earlier seasons that she was harbouring some resentment against her roomie because guys just automatically fall for her. She even calls her a whore, but she says she's just kidding. It appears last season that it's probably Cindy who makes it possible for the mother to play in the band at Robin's and Barney's wedding.

Danica McKellar's Trudy might also come back to the HIMYM set for a special Trudy-to-mother introduction. Many fans have hoped that Trudy would be introduced as the mother since "The Pineapple Incident" was aired in 2005. Who else do you think could come on board to get to meet the mother?

More 'How I Met Your Mother' Features:

How I Met Your Mother Season 9 Spoilers: Pre-Wedding Jitters to Push Robin to Ask Ted for Another Chance? [PHOTOS]
How I Met Your Mother Season 9 Spoilers: 'After the Wedding' Moments; Who's First to Meet the Mother -- Robin, Barney, or Lily? [READ]