NO! Not if you are serious about not having animal products.
The gelatin you eat in Jell-O comes from the collagen in cow or pig bones, hooves, and connective tissues. To make gelatin, manufacturers grind up these various parts and pre-treat them with either a strong acid or a strong base to break down cellular structures and release proteins like collagen. After pre-treatment, the resulting mixture is boiled. During this process, the large collagen protein ends up being partially broken down, and the resulting product is called gelatin. The gelatin is easily extracted because it forms a layer on the surface of the boiling mixture.
Gelatin is a common ingredient in foods because it is so versatile. It can be used as a gelling agent (as in Jell-O), as a thickener, an emulsifier, and a stabilizer. You'll find it in a variety of foods, from yogurt to chewing gum. Here is a list of some other foods that commonly contain gelatin:
gummy bears
sour cream
cream cheese
cake icing and frosting
marshmallows
soups, sauces and gravies
canned ham and chicken
corned beef
sausage
Gelatin is even used to make the coating for pills that makes them easier to swallow. It's also in cosmetics, lozenges, and ointments
Kosher gelatin can be made with fish bones, and/or beef skins. Contrary to assumptions, it is also considered kosher to use it with dairy products. Kosher law is very complex and the bones and hides used in gelatin production are considered pareve. The general meaning of pareve refers to foods that are neither milk nor meat, and many people assume this means that the product is vegetarian