Brad Keselowski agreed to a contract extension with Team Penske, following the lead of crew chief Paul Wolfe, who signed a new contract in June.
Terms of the deal were not disclosed but Team Penske said the agreement covers several years.
Since joining Penske in 2010, Keselowski has 22 victories and won the Sprint Cup title in 2012.
"In the time that Brad has driven for Team Penske, he has risen to the top echelon of stars in NASCAR," Roger Penske said in a statement. "Brad and Paul have established a terrific, winning combination and they are both real leaders within our team.
"More than just wins and championships, Brad is an important part (of) our relationship with Ford Performance and his work with (his) Checkered Flag Foundation shows what kind of person he is away from the track. There is no question he continues to be a great fit for our organization."
Keselowski and teammate Joey Logano are now both locked up "well into the future," per Penske's release.
The Miller Lite-sponsored Keselowski, 33, is currently fourth in the NASCAR playoffs standings which include the top 16 drivers.
"Roger and everyone at Team Penske have given me everything we need to win championships at the highest levels of NASCAR," Keselowski said. "As I have said all along, Team Penske is where I want to be and I am thrilled to continue with the organization well into the future. I have a lot of years left in the sport and I truly feel our best years are ahead of us."