The Hollywood sign has just finished undergoing a major facelift just before its 90th birthday.

Photos: Hollywood sign refurbishment

Old paint -- up to five coats in some places --was stripped off each of the nine letters and a fresh layer of white paint was added.

The refurbishment, which is the most-extensive work the sign has seen in 35 years, took nine weeks to complete.

"The Hollywood Sign Trust is excited that Hollywood's leading lady received two tons of makeup in time to celebrate her 90th birthday," said Chris Baumgart, chairman of the Hollywood Sign Trust, in a press release. "We thank Sherwin-Williams for participating in this public-private partnership to restore an American icon that is recognized as a symbol of hopes and dreams around the world."

Sherwin-Williams used multiple different products to ensure the sign's new luster would live for years to come.

"Painters applied 105 gallons of Sherwin-Williams Pro Industrial Pro-Cryl Universal Acrylic Primer -- a product specially designed for surfaces where rust and corrosion resistance is critical," the company said in a press release. "Lastly, they applied two coats -- 255 gallons -- of Emerald Exterior Acrylic Latex Paint in Sherwin-Williams High Reflective White. Emerald Exterior Paint offers extreme resistance to blistering, peeling, chalking, fading, mold, mildew and dirt pickup.

When the sign was first erected in 1923 it actually read: HOLLYWOODLAND. The "LAND" portion was removed permanently in 1949.

Watch a time-lapse video of the sign's refurbishment: