Miller with Proxima Nova in action on tinagauff.de

Under the hood

.content-1 { font-family: Miller, sans-serif; font-size: 12px; font-style: normal; font-weight: normal; letter-spacing: 1px; line-height: 10px; text-transform: none; color: #000000; }
.content-2 { font-family: ProximaBold, sans-serif; font-size: 11px; font-style: normal; font-weight: normal; letter-spacing: 3px; line-height: 21px; text-transform: uppercase; color: #FFFFFF; }

Miller is available from Adobe Fonts and Webtype.