How Can I Fix my Big Front Teeth?

Porcelain veneers allow a dentist to change the shape, color and length of teeth.  Your case will likely require treating MORE than just the two front teeth, since if they were made more narrow, then the adjacent teeth would need to be made more wide.  Seek the opinion of an experienced cosmetic dentist for advice on how many would be needed.

A minor gum reshaping over the lateral incisors with two porcelain veneers on the two lateral incisors will deminish  the "bunny" look of the centrals a and fill in the smile.a closer exam and X-rays would be needed to see if this conservative treatment would work for you as it has worked for so many of my patients who presented with very similar chief concerns.

The two front teeth do appear to be disproportionately large.  The laterals appear to be under-sized which can be common.  I imagine their is healthy enamel behind the gums tissue of the laterals.  Have your cosmetic dentist check the see if a gingivectomy is necessary to help with symmetry and the golden proportion (ideal smile/ tooth proportions).  
You could benefit from veneers to create a ideal smile, but I would try with reshaping the front two (enameloplasty) and the tissue change with the laterals first before a more invasive solution.  A mock-up (wax-up) of the front four would be a big help in determining what you like and don't like. 
Regardless, work with your doctor and come up with a solid plan that will make you happy and confident in treatment moving forward.   

Thank you for your question. I would recommend to consider porcelain veneers. If you are happy with a color of your teeth, consider 4-6 veneers. This approach will allow your dentist to give you more uniform, beautiful smile you desire.
Good luck.

At this stage, I would definitely recommend that you consider a combined restorative-orthodontic treatment as all other orthodontists have suggested. A wax-up of your proposed final treatment should be produced, either digitally or in plaster/wax, so that you can see how the front teeth will look like at the end. Invisalign treatment (as well as other digital clear removable tray companies) option would give you an idea how the doctor would create the space on your lateral incisors (#7 and 10) so that your restorative dentist can determine how wide the future procelain veneers on those teeth should be. If you still would like to talk to your original orthodontist, please make sure that he/she is aware what your original concerns were ("big front teeth") and show him the photos to point out the teeth that bothers you. Most orthodontists want their patients to have a happy outcome, so it would not hurt to speak to him/her. Best of luck!