We describe the preparation of ultra cold atomic clouds in a dilution refrigerator. The closed cycle 3 He/ 4 He cryostat was custom made to provide optical access for laser cooling, optical manipulation and detection of atoms. We show that the cryostat meets the requirements for cold atom experiments, specifically in terms of operating a magneto-optical trap, magnetic traps and magnetic transport under ultra high vacuum conditions. The presented system is a step towards the creation of a quantum hybrid system combining ultra cold atoms and solid state quantum devices.PACS numbers: 37.10.Gh 07.20.-N The development of cold atom/solid state hybrid systems holds the promise of creating a quantum interface between printed electronic circuits, atoms and light [1][2][3][4][5][6][7][8][9][10] with applications in quantum electronics and information processing. Several groups are currently preparing cold atomic clouds in the vicinity of superconducting chips at 77 K, cooled by liquid nitrogen, and at 4 K, cooled by liquid 4 He [11][12][13][14][15][16][17][18][19][20][21][22][23]. The vision of quantum state transfer between superconducting circuits and cold atoms requires further experimental development, in particular the preparation of atomic clouds close to millikelvin surfaces. This low temperature is required to operate superconducting quantum circuits and also enhances the coherence time of solid state quantum bits, which must be long enough to realize quantum state transfer to atomic degrees of freedom.The conditions for cold atom preparation and the operation of mK environments are, however, very different. The first requires several tens of milliwatts of laser power for laser cooling [24]. The second is highly sensitive to heat sources such as laser radiation, since the cooling power of dilution refrigerators is typically less than a milliwatt. Here, we describe an experimental setup that fulfills the requirements for both the production of ultra cold atoms and operation of a mK environment. We trap rubidium atoms in a 6 K environment inside a 3 He/ 4 He dilution refrigerator capable of mK temperatures. We demonstrate the operation of a magnetooptical trap loaded by a beam of slow atoms produced with a Zeeman slower. The MOT coils and end section of the Zeeman slower are constructed with superconducting electromagnets mounted on an additional 6 K plate of the cryostat. We transfer the atoms into a magnetic trap and demonstrate the first step in a magnetic transfer scheme to bring the atoms towards the mK environment.