Place chicken breasts in the bottom of the crockpot.
Add chicken broth, sliced carrots, celery, diced onion, minced garlic, dried thyme, dried parsley, salt, and pepper.
Cover and cook on low for 6-7 hours or on high for 3-4 hours until chicken is cooked through and vegetables are tender.
Remove chicken breasts and shred with two forks.
Return shredded chicken to the crockpot.
Add egg noodles and stir well.
Cover and cook on high for an additional 20-30 minutes until noodles are tender.
Adjust seasoning with salt and pepper if needed.
Serve hot, garnished with fresh parsley.