jackrabbit is the Americana-tinged country band co-led by actor-musicians Dermot Mulroney and his brother Kieran Mulroney. Cowriting and performing together, the brothers blend twangy guitars, layered harmonies, and emotion-rich lyrical storytelling to create what they term a "Cali-Country" vibe—drawing inspiration from the Bakersfield sound, the Eagles, and the soft-rock tradition of California’s Sunset Strip.

An interview in Atwood Magazine underscores that jackrabbit. is more than a side project—it’s “where all the pieces finally come together,” shaped over decades by shared history and deep creative instincts.

Their lineup includes the Mulroney brothers along with Sebastian Sheehan, Matt McFadden, and Henry Quirion, rounding out a five‑piece band delivering an authentic, emotional musical experience. 

Born October 31, 1963, in Alexandria, Virginia, Dermot Mulroney was raised in a creatively inclined household. His mother was a regional theater actress and his father a law professor and lawyer. At just seven, Dermot began playing the cello—a training ground that would become a lifelong passion.

• 1980s–1990s: Made his film debut in Sunset (1988) and earned recognition in Young Guns (1988) and Career Opportunities (1991). He became a romantic-comedy favorite with roles in Copycat (1995), How to Make an American Quilt (1995), and his highest-grossing film, My Best Friend’s Wedding (1997)

• 2000s: Continued to diversify with standout roles in About Schmidt (2002), The Wedding Date (2005), Must Love Dogs (2005), The Family Stone (2005), and the thriller Zodiac (2007)

• 2010s–2020s: Appeared in The Grey (2011), Jobs (2013), August: Osage County (2013), Insidious: Chapter 3 (2015), Dirty Grandpa (2016), and more recently Scream VI, Shooting Stars, and Anyone But You (all 2023)

• Television: Notable roles include Francis Gibson in Crisis (2014), Dr. Walter Wallace in Pure Genius (2016–2017), Sean Pierce in Shameless (2015–2016), John Carmichael in Hanna (2020–2021), President James Ritson in Secret Invasion (2023), Chief Dom Pascal in Chicago Fire (2024–present), and Jed Bank in The Hunting Wives (2025-Present)