Brad Pitt at 'Ease' at 60, 'Comfortable' with Girlfriend (Source

Brad Pitt seems 'relaxed' and 'at ease' with girlfriend Ines de Ramon following his recent 60th birthday, a source tells PEOPLE.

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Inside Brad Pitt's whirlwind 60th birthday weekend with Ines de Ramon

Brad Pitt celebrates his 60th birthday with his girlfriend Ines de Ramon

PHOTO He hadn't been this happy in a long time! Brad Pitt celebrated his 59th birthday with a new girlfriend - Free Press

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Brad Pitt at 'Ease' at 60, 'Comfortable' with Girlfriend (Source

Brad Pitt at 'Ease' at 60, 'Comfortable' with Girlfriend (Source Exclusive)

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Brad Pitt and Ines de Ramon's Relationship Timeline