I have a few wildflowers in the garden and I'm not sure if this plant is one of them or a weed. Thanks for the help with id! Apologies the focus blurred the flower a bit.
Well, it DOES have flowers! LOL
It is one of the wild lettuces. Pull it or you will have a lot more once those little "parachutes" open and drift across your garden.
You have several types of plants in the background that also want to take over your garden... ;-)