During Comic-Con 2014 last month, ABC presented a special video teasing Season 2 of Marvel's Agents of S.H.I.E.L.D., where Patton Oswalt's Agent Koenig revealed that Barbara "Bobbi" Morse, a.k.a. Mockingbird, will be popping up this season. Today, Marvel confirmed that Adrianne Palicki has been cast as Mockingbird, although her affiliation to Coulson (Clark Gregg) and his team were not revealed.

Take a look at the official press release below.

The Executive Producers of Marvel's Agents of S.H.I.E.L.D. have sent a Morse code to say they've found their Mockingbird!

RELATED: Agents of S.H.I.E.L.D. Is Bringing Back This Marvel Character

Adrianne Palicki will appear as Bobbi Morse, a.k.a. Mockingbird, in the second season of Marvel's Agents of S.H.I.E.L.D. -- but whether she'll play friend or foe to Coulson and his team, we can't say. Known for her work in Friday Night Lights and G.I. Joe Retaliation, Palicki most recently appeared in several episodes of About a Boy.

Palicki joins a number of new characters and guest stars on the series' second season, which premieres Tuesday, September 23 at 9:00 p.m. ET on ABC. Joining Palicki will be the previously announced Lucy Lawless (Agent Isabelle Hartley), Reed Diamond (Daniel Whitehall), Nick Blood (Lance Hunter), Henry Simmons (Alphonso "Mack" Mackenzie), and Kyle MacLachlan (Skye's father), alongside the returning cast of Clark Gregg (Director Coulson), Ming-Na Wen (Agent May), Brett Dalton (Grant Ward), Elizabeth Henstridge (Agent Simmons), Iain De Caestecker (Agent Fitz), and Chloe Bennet (Agent Skye).

Marvel's Agents of S.H.I.E.L.D. is Executive Produced by Joss Whedon (Marvel's The Avengers, Buffy the Vampire Slayer); Jed Whedon & Maurissa Tancharoen, (Marvel's Agents of S.H.I.E.L.D. pilot co-writers, Dollhouse, Dr. Horrible's Sing-Along Blog); Jeffrey Bell (Angel, Alias); and Jeph Loeb (Smallville, Lost, Heroes).

Marvel's Agents of S.H.I.E.L.D. is produced by Marvel Television and ABC Studios.

For more information on Marvel's Agents of S.H.I.E.L.D., and the other exciting Marvel Television series, stay tuned to Marvel.com.

In the Marvel Comics, Mockingbird was injected with an experimental serum that gave her superhuman strength and speed. She was also a S.H.I.E.L.D. agent who eventually became one of the Avengers, where she was romantically linked with Hawkeye, played by Jeremy Renner in the Marvel Cinematic Universe.

Are you excited to see Adrianne Palicki as Mockingbird? Chime in with your thoughts below.