She addressed this question on her blog:

link

haven't we known this for, like, a year now?

can't really say i'm surprised, it still sucks though now that it's been confirmed :(

no we haven't "known for, like, a year now". we knew that she wasn't going to be in season 7, but we didn't know that she for sure wouldn't be making any guest appearances. there have been rumors of her guest starring for a while now

i agree with Bailey

I love chil/leyton to death but we already knew this. I don't watch oth anymore anyhow - as far as I'm concerned the show's been expiring since season 6. S7 is beyond expired - hence the multiple character additions for the sake of a fresh start. My response? "Not interested." :D

DID YOU WANT TO BREAK MY HEART? CUZ YOU SUCCEEDED.

Even if I knew she wouldn't ever come back for good, I hoped she would at least come back for one episode!

^haha, i'm sorry! and i feel your pain. obviously we knew that she wasn't going to be in this season, but there was still the hope for atleast an appearance somewhere down the road... but i guess that's gone now

I thought that was determined last season, with her vid announcement!

When was that posted?
Cause yeah we knew she wasn't going to be in season 7 but there were chances of her to guest star.
:(

sad D=

I never wanted her and Lucas to leave.

What Bailey said, i honestly wasn't expecting her (or Chad) to come back.
So i can't say i'm bummed about it, because i guess i already knew.
But i'm not happy either. It's sad she's over with OTH.

Sorry but I really don't care. And it's no surprise either.
I loved Peyton (and also Lucas) in the show, but I somehow don't notice they're gone...meaning I love season 7 so far (:

Not even for a series finale? That would suck!

My day just got ruined! :( I was really hoping that she would at least make one guest appearance! fml :(

Sorry but i cudent care less siche Leyton lest OTH has gottent more interestion!

I figured her or Chad wouldn't come back even for one episode. I don't really care seeing how season seven is amazingly good so far!

I was really hoping she'd come back for Brooke's maybe wedding and maybe baby, she just can't miss those moments!

^ yeh

ohh god.. I was hoping she would at least guest star with Chad..

I'm bummed, and I'm also a little angry. I don't need to hear any bitching about this but i think it's really kind of selfish to totally say she won't come back even for one last episode.

One Tree Hill made her the star she is, no offense but TRL really isn't that important. I will continue to be a fan of Hilarie, and if she stars in anything new hopefully I will be interested in it, but I've lost a little respect for her.

And i will say it once again, I DO NOT NEED TO HEAR ANY BITCHING OVER MY OPINION. I'm being perfectly respectful with my opinion, and i don't need anyone to agree with me so please, for the few people that i know can't help themselves, for once just keep it to yourself.

^^Well your opinion SUCKS!!! Lol, jk :D
Maybe Hil will change her mind :)
At least for the finale....

lol Abs. I have no problem with people disagreeing with me, i just don't want anybody getting rude with me you know?!

It sucks.

shes not my fave character but it wud suck not to see her for just at least one more epi:(

I think her separation from OTH wasn't as smooth as it seems. I read it was a mutual agreement for Hilarie to leave the show but I'm not so sure now. My guess is she wanted to stay on the show, but Mark didn't want Peyton without Leyton and this sucks. But if that's the case I can also understand why Hilarie will not be coming back; not even to Brooke wedding or to the series finale.