She's either still glowing from her engagement or she's got a bun in the oven!

Nicky Hilton dropped by the Kyle by Arlene store in Beverly Hills today for some shopping, and we couldn't help but notice that the socialite was sporting what looked to be the beginnings of a baby bump. Granted, tucking button downs into skirts can be a little tricky and cause some bunchiness, but given that her beau James Rothschild just proposed, we have to wonder!

The heiress and the British banking heir began dating in 2011, and he popped the question during a romantic vacay in Lake Como this past August.