She spent the last seven years working alongside Holmes on Sky's Sunrise before moving to the ITV breakfast show in April.
The 39-year-old revealed that she misses her early mornings with him.
"It's hard when you've worked side by side with someone for so long and you get to the stage where you're finishing each other's sentences," she told the Sunday Express magazine.
"I learned so much from working alongside him. When I started at Sky, I had this vision of how a newsreader should be and sound.
"His approach is very much 'be yourself' - and that is what he helped me to do over that time."
Hawkins now co-hosts Good Morning Britain with former BBC star Susanna Reid, Ben Shephard and Sean Fletcher.
She dismissed any claims of the competitiveness between her female co-anchor.
"We've all got on, right from day one," she insisted.
"You should see what goes on in the ad breaks and we all go out for drinks after work.
"I'm working with my friends. Who could ask for more?"
Hawkins, who grew up in the Sussex village of Sidlesham, said she decided to join the GMB when her father was diagnosed with motor neurone disease in 2011.
"I'd always been the sort of person who was cautious about taking risks and would weigh up any decision," she recalled.
"But with dad's illness, it just reinforced how short life is and how important it is to seize opportunities when they come your way."