Naomi Watts celebrates her son Kai’s 12th birthday with a sweet tribute

Naomi Watts celebrates her son Kai’s 12th birthday with a sweet tribute saying how ‘lucky’ she feels being his mother

She shares two beautiful children with her ex-partner Liev Schreiber.

And on Sunday, Naomi Watts paid tribute to her youngest son, Samuel ‘Kai’ Schreiber, as she celebrated his 12th birthday.

Taking to Instagram, the 52-year-old actress revealed how ‘lucky’ she felt being his mother and shared several pictures of her little boy.

Proud mother! Naomi Watts (left) has paid tribute to her youngest son, Samuel ‘Kai’ Schreiber (right), as she celebrated his 12th birthday. Taking to Instagram on Monday, the 52-year-old detailed how ‘lucky’ she felt to be his mother as she shared several pictures of the young boy

‘Happy Birthday to Kai! Your beautiful spirit, wicked humor and quick mind inspire us all,’ she captioned the post.

‘I feel so lucky to be your mummy. Every day you blow me away. The depth of your thinking is truly special. You are my angel.’

In the accompanying pictures, Kai is shown biting into a red capsicum while at the beach, and posing for the camera in a series of artistic shots.

He is also shown enjoying quality time with his famous parents and brother, Sasha.

'Happy Birthday to Kai!! Your beautiful spirit, wicked humor and quick mind inspire us all,' Naomi captioned the series of pictures she uploaded of Kai on Instagram on Monday

‘Happy Birthday to Kai!! Your beautiful spirit, wicked humor and quick mind inspire us all,’ Naomi captioned the series of pictures she uploaded of Kai on Instagram on Monday

'I feel so lucky to be your mummy. Every day you blow me away. The depth of your thinking is truly special, you are my angel,' Naomi said about her youngest son

‘I feel so lucky to be your mummy. Every day you blow me away. The depth of your thinking is truly special, you are my angel,’ Naomi said about her youngest son 

Happy birthday Kai! In the series of pictures, Kai can be seen biting into a red capsicum while sitting at the beach, as well as staring candidly at the camera in multiple shots. He is also spotted enjoying his time with his mother and father while out and about

Happy birthday Kai! In the series of pictures, Kai can be seen biting into a red capsicum while sitting at the beach, as well as staring candidly at the camera in multiple shots. He is also spotted enjoying his time with his mother and father while out and about

Several of Naomi’s famous friends, including Kate Hudson and Julianne Moore, also wished Kai a happy birthday in the comments section.

Meanwhile, Liev celebrated Kai’s birthday with a sweet Instagram post of his own. 

‘Happy Birthday, Kai! I love you beyond beyond,’ wrote the American actor, 53. 

Gender fluid: Kai was born as a boy but has been raised by Naomi and Liev, 53, without gender stereotypes. Pictured: Naomi, Alexander 'Sasha' Pete, 13, and Kai

Gender fluid: Kai was born as a boy but has been raised by Naomi and Liev, 53, without gender stereotypes. Pictured: Naomi, Alexander ‘Sasha’ Pete, 13, and Kai

Liev is in Italy shooting the movie Across the River and Into the Trees, an adaptation of the Ernest Hemingway’s novel of the same name.

He and Naomi also have another son, Alexander ‘Sasha’ Pete, who is 13.

The couple, who split in 2016 after 11 years together, amicable co-parent their boys. 

Wishing from afar: Kiev (pictured) also celebrated Kai's 12th birthday with a sweet Instagram post of his own. Liev is currently in Italy shooting his upcoming movie, Across The River And Into The Trees, and was spotted arriving on the Venice set on Friday

Wishing from afar: Kiev (pictured) also celebrated Kai’s 12th birthday with a sweet Instagram post of his own. Liev is currently in Italy shooting his upcoming movie, Across The River And Into The Trees, and was spotted arriving on the Venice set on Friday