09/19/2016 10:48 EDT

Liev Schreiber Kids: Proud Papa Walks Red Carpet With Oldest Son

Liev Schreiber surprised everyone with his dashing plus one on the Emmy red carpet — his oldest son, Sasha.

"It was one of the best days of my life. So proud to be here with Sash, so proud of him and it's just a great night," Schreiber told ET on Sunday night about bringing his nine-year-old.

He also talked about getting ready for the big night and seeing his son put on his first tux: "It's amazing watching him go through it. It just brought it all back for me — the first time I put on a suit and how excited I was and how excited he is."

The proud papa of two boys didn't shy away from sharing his excitement on Instagram.

Sash and me getting ready... @showtime #raydonovan #emmys

A photo posted by Liev Schreiber (@lievschreiber) on

Thank you so much #CervandoMaldonado and #Fabiola! #raydonovan #emmys @showtime

A photo posted by Liev Schreiber (@lievschreiber) on

Boom! Time to go home. Nicked this one on the way out.

A photo posted by Liev Schreiber (@lievschreiber) on

Schreiber even declared Sasha best dressed of the night — and we couldn't agree more.

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2016 Emmys Red Carpet