Gwyneth Paltrow has wished her boyfriend Brad Falchuk a happy birthday over Instagram.

Gwyneth Paltrow and Brad Falchuk (c) Instagram

Gwyneth Paltrow and Brad Falchuk (c) Instagram

The 44-year-old actress has been dating the 'Glee' co-creator since August 2014 and has wished "handsome" Brad a happy 45th birthday using social media.

Alongside a grainy picture of the couple sat side-by-side, Gwyneth wrote on the photo-sharing website: "Happy birthday, handsome."

The heartfelt message comes shortly after the 'Iron Man' actress - who was married to Coldplay singer Chris Martin from 2003 until 2016 - revealed she worries about "f***ing up" as a mother.

Gwyneth shares a 12-year-old daughter called Apple a ten-year-old son called Moses with her ex-husband, and admitted to feeling insecure about her parenting skills.

She shared: "The other night, I was in the bath and I texted my best mom friend, 'Am I f***ing this up?' And she was like, 'No! Breathe. We all feel this way, take a step back. Your kids are great.' It's tough, but it's the most important thing I do by far.

"It's challenging, rewarding and very emotional. It's like going through childhood again, but standing next to the people that you love more than you've ever loved anybody in the world and helping them bear their heartaches and mistakes and triumphs."

Gwyneth said it takes a lot of time and effort in order to "shape" her children into the people she hopes they will become.

The Hollywood star explained: "I think our parents all parented out of instinct and how they were parented, and it takes an incredible amount of energy to divert from that path and be like, 'No, I want to think about this.'

"So not just being reactive and carving out the time to think about how you want to handle something - how you want to help shape them and help support them."