Andy Cohen pays emotional tribute to Natasha Richardson as he marks 15th anniversary of her tragic death aged 45 in skiing accident: 'She was perfectly marvelous'

Andy Cohen paid an emotional tribute to his late friend Natasha Richardson on Monday on the 15th anniversary of her tragic death aged just 45.

The Watch What Happens Live host, 55, shared some sweet photos of Richardson - who was wed to Liam Neeson - and other friends as he lauded the 'perfectly marvelous' actress.

'Fifteen years ago today, heaven got a new angel,' he started in the caption.

Cohen added, 'Natasha was 'Perfectly Marvelous'… and left a profound impact on her friends, and on millions who she touched as an artist.'

Richardson died of an epidural hematoma on March 18, 2009, two days after she sustained a head injury during a skiing accident. She was 45.  

Andy Cohen marked the 15th anniversary of friend Natasha Richardson's death on Monday, sharing throwback photos of the pair with a heartfelt tribute

Richardson was 45 when she died of an epidural hematoma on March 18, 2009, two days after she sustained a head injury during a skiing accident

Cohen gave a glimpse at their friendship with photos of them dancing, vacationing, and attending red carpet events together.

The images also featured Richardson's widower Liam Neeson and friends Sarah Jessica Parker, Matthew Broderick, Ralph Fiennes, and Kristen Johnson. 

'I'm trying to put into words the effect she had on my personal trajectory and one way I'm thinking is that she unlocked a window into the world that I'd never considered,' wrote Cohen.

He praised Richardson for teaching him 'about 'the good life' in all senses of the word (art, travel, food, wine, fashion).

'But beyond that she was dogmatic about the importance of community, shared experience, kindness, manners, laughter and love - all the truly important things in life,' he continued. 

'I think there was a part of me during those magical years where she was the ringleader for the best things in life that knew that this lightning in a bottle couldn't last forever,' said Cohen. 'I sure appreciated that time then, and it lives inside me forever.'

Cohen added that Richardson 'would be disgusted with the rise of social media, and of the current state of the world and politics, but she would've remained the center of gravity for her family and friends who all lovingly floated in her orbit.'

Cohen gave a glimpse at their friendship with photos of them dancing, vacationing, and attending red carpet events together

'We were a merry bunch bound completely together by Her,' wrote Cohen, sharing throwback photos of them with her widower Liam Neeson and friends Ralph Fiennes and Kristen Johnston

Another photo featured a red carpet moment with Sarah Jessica Parker and Matthew Broderick

Natasha posed with Liam, Andy and Ralph in a fun snap

The star was wed to Neeson from 1994 to her death (pictured 1997)

Richardson is survived by Liam, 71, and their sons Micheál Richardson , 28, and Daniel Neeson , 27 (pictured 2008)

'We were a merry bunch bound completely together by Her. If you can, raise a glass today to the great Natasha Richardson and let her know we all miss her down here,' added Cohen.

The British actress was known for her roles in movies like the 1990 Handmaid's Tale adaptation, Parent Trap (1998), Maid in Manhattan (2002) and Wild Child (2008).

Richardson is survived by Liam, 71, and their sons Micheál Richardson, 28, and Daniel Neeson, 27.