Ronald Franklin "Ron" Block (born July 30, 1964) is an American bluegrass and alternative country musician, mainly playing the banjo and the guitar, singing, and writing gospel music.

Block was born in 1964 in Inglewood, California. He received his first guitar at 11. He first became interested in banjo at 13, after seeing Earl Scruggs play on television. His interest in guitars and singing grew after seeing The Stanley Brothers and Larry Sparks. He is best known for his participation in the Grammy Award winning band, Alison Krauss & Union Station.

For the past twenty years, Ron Block has been the spiritual touchstone of Alison Krauss and Union Station, contributing sterling musicianship on banjo, guitar, vocals, and songwriting.

Alison Krauss and Union Station have recorded 10 of Block’s songs since 1992, including There Is A Reason," "In The Palm of Your Hand," "Jesus Help Me To Stand," and "A Living Prayer, which received a 2006 Gospel Music Association Dove award. His songs have also been recorded and performed by Rhonda Vincent (“You’re In My Heart”), Randy Travis (“Which Way Will You Choose”), Dan Tyminski (“Be Assured,” “The One You Lean On,” and “It All Comes Down To You”), Michael W. Smith (“Loving You Eternally”), Rhonda Vincent (“You’re In My Heart”), the Cox Family, and the Forbes Family.

Alison Maria Krauss (born July 23, 1971) is an American bluegrass-country singer, songwriter and fiddler. She entered the music industry at an early age, winning local contests by the age of ten and recording for the first time at fourteen. She signed with Rounder Records in 1985 and released her first solo album in 1987. She was invited to join the band with which she still performs, Alison Krauss and Union Station (AKUS), and later released her first album with them as a group in 1989.

She has released fourteen albums, appeared on numerous soundtracks, and helped renew interest in bluegrass music in the United States. Her soundtrack performances have led to further popularity, including the O Brother, Where Art Thou? soundtrack, an album also credited with raising American interest in bluegrass, and the Cold Mountain soundtrack, which led to her performance at the 2004 Academy Awards. As of 2012, she has won 27 Grammy Awards from 41 nominations, making her the most awarded living recipient, and three back of the most honoured artist, classical conductor Sir Georg Solti. She is also the most awarded singer and the most awarded female artist in Grammy history. At the time of her first award, at the 1991 Grammy Awards, she was the second youngest winner ever (currently tied as third youngest).

Daniel John "Dan" Tyminski (born June 20, 1967 in Rutland, Vermont) is a bluegrass composer, vocalist, and instrumentalist. He is a member of the band Alison Krauss and Union Station and has released two solo albums, Carry Me Across the Mountain (2000), on the Doobie Shea Records label, and Wheels (2008), on the Rounder Records label.

He is best known for his updated version of the song "Man of Constant Sorrow," which was featured in the movie O Brother, Where Art Thou? and won the 2001 CMA award for best single as well as a Grammy Award for best Country Collaboration with Vocals (along with Harley Allen and Pat Enright, filling out the vocals for the movie's Soggy Bottom Boys). In total, he has won 10 Grammy awards for solo and collaborative projects.

Tyminski was born June 20, 1967 in Rutland, Vermont and plays a bluegrass style that blends traditional and pop traditions. Before becoming a member of Union Station in 1994, Tyminski played mandolin and sang in the Lonesome River Band. Though Tyminski's love and feel for traditional bluegrass didn't come from growing up in the southern Appalachians, he absorbed and learned the music just the same. He credits his brother Stan with getting him hooked on the guitar and mandolin at the age of 6. While Stan was in the Navy and home on leave, he left his mandolin with his younger brother.

Sierra Hull (born September 27, 1991) is an American bluegrass singer and mandolinist and guitarist.

Hull was signed to Rounder Records at the age of 13 and released her debut album, Secrets, in 2008 at the age of 16. The album peaked at #2 on the Billboard Top Bluegrass Albums chart. Her second album, Daybreak, was released on March 8, 2011.

Sierra Hull was born and raised in Byrdstown, Tennessee and attended Pickett County High School before accepting a Presidential Scholarship to study at the Berklee College of Music.

Hull began playing the mandolin at the age of eight and put out the album Angel Mountain at 10. Hull was soon playing jam sessions with other musicians in her family, and by 2001 she was entering local talent contests. Her parents, Stacy and Brenda, took her to numerous bluegrass festivals and it was during an International Bluegrass Music Association festival that she came to the attention of Rounder Records chief talent scout Ken Irwin. At age 11 she was mentored and befriended by Alison Krauss, herself once a child prodigy on the fiddle.

Earl Eugene Scruggs (January 6, 1924 – March 28, 2012) was an American musician noted for perfecting and popularizing a three-finger banjo-picking style (now called "Scruggs style") that is a defining characteristic of bluegrass music. Although other musicians had played in three-finger style before him, Scruggs shot to prominence when he was hired by Bill Monroe to fill the banjo slot in his group, the Blue Grass Boys.

Scruggs was born near Shelby, Cleveland County, North Carolina, to Georgia Lula Ruppe and George Elam Scruggs, a farmer and bookkeeper, who played banjo and died when Scruggs was four years old. His older brothers, Junie and Horace, plus his two older sisters, Eula Mae and Ruby, all played banjo and guitar. Scruggs' mother played the organ. He grew up in Cleveland County, North Carolina.

Scruggs joined Bill Monroe's Blue Grass Boys in late 1945, and quickly popularized his syncopated, three-finger picking style. In 1948 Scruggs and guitarist Lester Flatt left Monroe's band and formed the Foggy Mountain Boys, also later known simply as Flatt and Scruggs. In 1969, they broke up, and he started a new band, the Earl Scruggs Revue, featuring several of his sons.