We present ALMA multiwavelength observations of the protoplanetary disk around the nearby (d~100pc) young solar analog MP Mus (PDS 66). These observations at 0.89mm, 1.3mm, and 2.2mm have angular resolutions of ~1", 0.05", and 0.25", respectively, and probe the dust and gas in the system with unprecedented detail and sensitivity. The disk appears smooth down to the 4au resolution of the 1.3mm observations, in contrast with most disks observed at comparable spatial scales. The dust disk has a radius of 60au, a dust mass of 0.14M_Jup_, and a mm spectral index 40au. The lack of mm emission at radii r>60au also suggests that the gap in scattered light between 30-80au is likely not a gap in the disk density, but a shadow cast by a puffed-up inner disk.

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