Brad Pitt Rings in 60th Birthday with 'Low Key' Celebrations (Exclusive)

Brad Pitt marked his six-decade age milestone on Monday with his girlfriend Ines de Ramon and close friends by his side, a source tells PEOPLE

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Brad Pitt's 60th birthday, Paris photos with girlfriend Ines de Ramon

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Brad Pitt turns 60! Inside the Hollywood hunk's 'very low-key' birthday plans alongside girlfriend Ines de Ramon, his children and close friends

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Inside Brad Pitt's 60th Birthday Celebrations With Ines de Ramon: From Paris to Los Angeles