Anna Kendrick thinks Blake Lively would happily donate a kidney to her if she needed one.

The 33-year-old actress stars alongside Blake, 31, in the new mystery thriller movie 'A Simple Favor', and Anna has revealed they managed to develop a strong bond during their time on set.

She shared: ''Blake would do anything for me. She would give me a kidney. I'm not kidding.''

In fact, Anna has even joked about competing with Blake's husband Ryan Reynolds for her affections.

She told 'Entertainment Tonight': ''You know what it is? Ryan's an attractive, famous, successful man and you need to keep them on their toes.

''He's got a great lady and I just need to let him know that Blake's got options, you know what I'm saying!''

Anna also jokingly revealed how she intends to keep their friendship strong after the current press tour ends.

She said: ''I'll just be sneaky. I'll just slide into her DMs.''

Meanwhile, Henry Golding - who appears alongside Blake and Anna in the new movie - recently confessed to being starstruck on the set of 'A Simple Favor'.

The 31-year-old actor admitted to initially being a little overawed about working with the actresses, having watched them both when he was ''growing up''.

He explained: ''It was quite a small set, really. The main cast was four or five people, so the proximity, really in this film-making, was so much closer.

''It's easy to kind of get very nervous about it. And there were certain days where I was like, 'What am I doing? Why am I here?'''

Despite his fears, Henry found them both to be very professional and friendly.

He said: ''Those two girls are 110 percent, on and off the camera. And that, I've heard, can be sometimes fleeting or rather rare in the industry.

''To have people who, even when they're standing on the side, give everything to get the best performance out of you - and they've been doing it for so long - really is a testament to who they are as actresses and why they're so successful. I love them to death.''