This Australian actress scored a big hit playing Rhonda, the ABBA-loving, party-hearty friend who helps Toni Collette break out of her shell, in P J Hogan's 1994 comedy "Muriel's Wedding", for which she won an Australian Film Institute Award as Best Supporting Actress. The dark-haired, offbeat-looking Griffiths (who is often confused with Juliette Lewis and Amanda Plummer) has parlayed her success into an active career in leads and second leads in Australia as well as the USA, becoming a virtual workhorse in features.

Griffiths first won attention in 1991 when she devised and performed in the short film "Barbie Gets Hip", which received festival screenings. She has also appeared on the Australian TV series "Secrets" (1993) as well as the comedy special "The Jimeon Show". Between her film assignments, the actress has appeared frequently with the Melbourne Theatre Company, including productions of "The Grapes of Wrath", "The Sisters Rosenzweig" and "Sylvia" before getting her breakthrough film role.

In 1996, she co-starred in "Cosi", as the law-student girlfriend of a drifter working as a therapist in a mental hospital, Michael Winterbottom's "Jude", as the sexy first wife who eventually abandons Christopher Eccleston's title character, "To Have and to Hold", as a romance writer wooed by a mysterious Frenchman (Tcheky Karyo) and "Children of the Revolution", as the leather-clad policewoman who romances the alleged son of Josef Stalin. The busy actress continued to solidify her position as a promising talent. She was a hard-bitten English prostitute who falls for an older Pakistani cab driver (Om Puri) in "My Son the Fanatic" (1997). That same year, Griffiths reteamed with P J Hogan as Cameron Diaz's Southern belle cousin in "My Best Friend's Wedding". She followed with the decidedly supporting role as one of the oddball residents in Stephan Elliott's "Welcome to Woop Woop" before coming into her own with a superb portrayal of flautist Hilary du Pre in the biopic "Hilary and Jackie" (both 1998). While co-star Emily Watson received much attention as the more flamboyant Jacqueline du Pre in the latter, Griffiths served as the film's emotional anchor and offered a richly observed characterization, one which the Academy members recognized with a Best Supporting Actress Oscar nomination. Griffith was subsequently cast as Johnny's Depp's mother in the cocaine crime feature "Blow" (2001).

The actress took on her first major television series role when she was cast as Brenda Chenowith in the acclaimed HBO series "Six Feet Under" (2001-2005). Griffith's excellent protrayal as the deeply dysfunctional Brenda, who was raised as a mental and emotional experiment by her psychologist parents, earned her a pair of Emmy nominations, first as Outstanding Lead Actress in A Drama Series in 2002, and then as Outstanding Supporting Actress in a Drama Series in 2003.

During her television run Griffiths also kept busy in feature films with appearances in fare like "The Rookie" (2002) and the telepic "Plainsong" (2004), and she would continue to regularly appear in Australian productions including the crime thriller "The Hard Word" (2002), the historical biopic "Ned Kelly" (2003) and the television miniseries "After the Deluge" (2003).

from movies.yahoo.com

  Untitled Music High Project (2006) (post-production)

The Suffering: Ties That Bind (2005) (VG) (voice) .... Jordan
Angel (2005) .... Nicole
Plainsong (2004) (TV) .... Maggie Jonas
"After the Deluge" (2003) (mini) TV Series .... Annie
Ned Kelly (2003) .... Mrs. Scott
... aka Ned Kelly: Public Enemy No. 1 (Philippines: English title: poster title)
The Adventures of Tom Thumb & Thumbelina (2002) (V) (voice) .... Albertine
The Hard Word (2002) .... Carol
The Rookie (2002) .... Lorri Morris
"Six Feet Under" (2001) TV Series .... Brenda Chenowith
Very Annie Mary (2001) .... Annie Mary Pugh
... aka Annie-Mary à la folie! (France)
Blow (2001) .... Ermine Jung
Blow Dry (2001) .... Sandra
... aka Über kurz oder lang (Germany)

Me Myself I (1999) .... Pamela Drury
... aka Chance de ma vie, La (France)
... aka Me Myself I (La chance de ma vie) (France)
Hilary and Jackie (1998) .... Hilary du Pré
Amy (1998) .... Tanya Rammus
Divorcing Jack (1998) .... Lee Cooper
Among Giants (1998) .... Gerry
Since You've Been Gone (1998) (TV) .... Sally Zalinsky
My Son the Fanatic (1997) .... Bettina
My Best Friend's Wedding (1997) .... Samantha Newhouse
Welcome to Woop Woop (1997) .... Sylvia
To Have and to Hold (1996) .... Kate
Jude (1996) .... Arabella
Children of the Revolution (1996) .... Constable Anna
Cosi (1996) .... Lucy
Small Treasures (1995) .... Jane
Muriel's Wedding (1994) .... Rhonda Epinstalk
... aka Muriel (France)
"Jimeoin" (1994) TV Series .... Additional Characters
The Feds (1993) (TV) .... Angela Nraglia
"Secrets" (1993) TV Series .... Sarah Foster