Graham Rahal is set to be announced as Rahal Letterman Lanigan's driver for 2013 at a press conference in Indianapolis later today. The 23-year-old has been linked to the team part-owned by his father, 1986 Indy 500 winner and three-time series champion Bobby, since declaring his free agency in an interview in August.
He has spent the past two seasons with Chip Ganassi Racing, achieving a best championship result of ninth in 2011, and a best race finish of second on three occasions, the most recent being at Texas this year.
The Rahals previously teamed up at the 2010 Indianapolis 500, where Graham finished 12th.
This story will be updated following the announcement.