Featured in the musical episode, Bilson may be the mother that Ted has been talking about in the past five seasons.
In a "How I Met Your Mother" episode where Ted comes closest to unveiling the big secret, Rachel Bilson will guest star as one of his many love interests. How "The O.C." star will look like in the episode airing January 11 is revealed when CBS unleashes more stills that have her sharing screen with Josh Radnor.
Bilson will play a character named Cindy who supposedly is a student of him. They go out for a dinner and audience are "one step closer to meeting the future mother of his kids." However, it is not yet confirmed whether Bilson will be the Mother.
Beside Bilson, Stacy Keibler will guest star as Karina, a girl whom Barney takes interest in but unable to impress with his suits. Tim Gunn also makes a cameo, becoming a personal fashion consultant to Barney and a tailor for him.
"Girls vs. Suits" will be a musical to mark the 100th episode. There will be a grand musical number featuring 65 dancers and 50-person orchestra with choreography by Zach Woodlee of "Glee".